Historic Architecture in Bhutan

1 Introduction

Few architectural traditions express the order of a society as directly as Bhutan’s. In a country of mountains rather than of hills and valleys, a single formal language shapes the towering fortress-monastery that governs a district, the temple that houses a divinity, the memorial chorten standing at a dangerous crossroads, and the farmhouse in which a family lives above its animals. Massive walls of rammed earth or stone, battered inward and tapering as they rise; a timber frame assembled without a single nail; windows and balconies that grow larger and more ornate toward a deep, shingled roof weighted with stones—these recurrent features bind the grandest and the humblest buildings into one recognisable idiom. This essay examines that idiom as material fact: as a body of forms, materials, building types, and physical practices that can be observed, measured, and cared for.

The questions it pursues are at once formal, technical, and historical. Why does Bhutanese architecture diverge so markedly from the Tibetan building tradition from which it descends—and how far is that divergence the work of a wet, seismic, heavily forested Himalayan setting rather than of taste? How does a tradition that builds without drawn plans achieve such coherence across every scale, from the proportions of a window to the silhouette of a fortress? The answer offered repeatedly by the sources lies in the body of the master-builder: at Punakha Dzong the entire spatial order is generated from the builder’s own anthropometric measure, transmitted by oral instruction and on-the-job training rather than by drawing. The buildings themselves furnish the most vivid evidence of the tradition’s character—rammed-earth walls so dense that a nineteenth-century observer found rifle bullets fired from eighty yards merely flattened against them; the iron-chain suspension bridges of the saint-engineer Thangtong Gyalpo, credited with more than fifty such crossings; the dzong that, unlike the dead castles of medieval Europe, remains a “living” monument still performing the functions for which it was built; and the early temples set, according to tradition, upon the limbs of a supine demoness to “tame” the land for Buddhism.

The approach taken here rests on a single methodological premise: that the standing fabric is itself the primary document. The buildings record, in their form and in the marks of damage, repair, and ritual modification, both the intentions of their makers and the history of their use; written chronicles, the drawings and photographs of early travellers, measured survey, and the laboratory analysis of pigments and plasters are then marshalled to corroborate and extend what the fabric reveals. The scope is correspondingly broad, encompassing the means by which the architecture is known, the materials and techniques by which it is made, the formal and symbolic language it speaks, its principal building types, its development over more than a millennium, its relation to landscape and settlement, and the conservation of the heritage it constitutes.

The essay is organised in eight further chapters. It opens with the sources and methods for studying Bhutanese architecture, establishing the standing fabric as primary evidence and surveying the documentary, art-historical, and scientific means of recording and analysing it (Section 2). It then turns to materials, construction, and building practice—the environmental determinants of design, the material palette, the structural systems, seismic behaviour, and the social and ritual organisation of the building process (Section 3). The architectural language follows: the proportional canon, the cosmological and geomantic ordering of site and plan, the organisation of space, the language of the façade, and the integration of ornament, colour, and image (Section 4). A typology of buildings then describes the principal types in turn, from the dzong through the temple, monastery, chorten, palace, and farmhouse to minor and ancillary structures (Section 5). The historical development of the tradition is traced from its Tibetan inheritance, through the codification of the classical idiom under the Zhabdrung in the seventeenth century, to the threshold of the modern period under the Wangchuck dynasty (Section 6). The frame then widens to architecture in the landscape—siting, settlement, urban form, and the infrastructure of bridges, water, and roads (Section 7)—before the essay concludes with the conservation of the built heritage: its threats, the distinctive philosophical problem of authenticity in a culture of renewal, and the institutions, documentation, and craft continuity on which its survival depends (Section 8). A short conclusion draws the threads together.

2 Sources and Methods for the Study of Bhutanese Architecture

The study of Bhutanese architecture rests on a particular evidential premise: that the buildings themselves are the principal documents. This section sets out the sources and methods through which the country’s built environment may be known, asking what can serve as evidence for its architecture and how that evidence is recorded, read, and analysed. It opens by treating the standing fabric—temples, dzongs, and fortified monasteries—as a primary document in its own right, whose form, physical condition, and continued use record both original intention and the long history of subsequent intervention (2.1). It then turns to the means by which that fabric has been documented over time, from the late-eighteenth-century drawings of Samuel Davis through early photography, measured survey, and standardized inventory to digital recording systems (2.2). Two further groups of methods complement direct observation: art-historical and iconographic analysis, which reads the disposition of images and ornament as integral to a building’s meaning (2.3), and the technical and scientific methods—pigment analysis, laboratory imaging, and scientific dating—that establish the material and chronological basis of the fabric and disclose information invisible to inspection alone (2.4). Running through the whole is a single methodological problem: how the physical witness of the buildings is to be combined with written, visual, and laboratory evidence to yield a reliable account of architectural form, technique, and history.

2.1 The standing fabric as primary document

The buildings of Bhutan are themselves the principal source for the study of the country’s architecture. Temples, dzongs, and fortified monasteries constitute primary documents through their physical fabric and spatial organization, providing direct evidence of building practice, spatial conception, and architectural intention. Their physical condition—evidence of damage, repair, and ritual modification—records the history of their use and care, and corroborates references found in written and oral tradition.¹

2.1.1 Early temples as material evidence

The standing structures associated with the first diffusion of Buddhist doctrine in the 8th and 9th centuries provide direct evidence of the earliest building tradition. These include sKyer-chu lHa-khang and Byams-pa'i lHa-khang in the Chos-'khor valley of Bum-thang, Kho-mthing in lHo-brag, Bu-chu in Kong-po, and others distributed across the landscape. Though subject to later restoration and refurbishment, these buildings preserve original elements and demonstrate continuity of form and technique across centuries.¹

The temple of dKon-mchog-gsum in Bum-thang exemplifies this documentary value. Its diminutive scale, its central Vairocana image, and the associated megalithic elements in the forecourt and temple precinct constitute material evidence of antiquity that corroborates textual references and local tradition. The broken votive bell (cong) preserved at the temple, though a transportable object, functions as an artifact of the standing complex and provides epigraphic evidence of early contact and patronage relationships.¹

The standing temples of Bum-thang and the sPa-gro valley more broadly serve as primary documents for understanding early Bhutanese architecture: their scale, materials, central images, and associated votive objects give direct evidence of antiquity and original function. At dKon-mchog-gsum the bronze bell and a megalithic pillar contextualize the temple’s role within the early Buddhist programme; the mutilated condition of both bell and pillar suggests the activity of an invading force, possibly that of Lajang Khan in 1714, providing material evidence for events documented in written sources.²

The architectural simplicity and diminutive scale of these early temples—uncharacteristic of later Bhutanese temple construction—distinguish them as witnesses to an earlier building tradition. The survival of original contents, such as the clay images at dKon-mchog-gsum and the Amitayus image in the White Temple of the Had valley, over which later restorative work was added, demonstrates the general pattern of continuity and modification that characterizes these early foundations. The standing fabric thus reveals both the original conception and the successive interventions that have shaped these buildings.²

2.1.2 Dzongs and fortified monasteries as architectural record

The dzongs and fortified monasteries present themselves as primary documents through their physical form and spatial organization. Poonakha-jong (Punakha) exemplifies the typological coherence of Bhutanese fortress architecture: a parallelogram plan divided into successive courts, with the main citadel—a square tower approximately 40 feet at the base and 80 feet high—positioned at the south end of the first court. The building demonstrates a standardized defensive logic repeated across the country’s major fortifications. Its capacity to house 6,000 souls or more, combined with its compartmentalized court system and flanking residential buildings, reveals the dzong’s dual function as both military stronghold and administrative-monastic centre. Despite damage from the 1897 earthquake and subsequent repairs, the standing fabric preserves evidence of original construction methods and spatial hierarchies.³

Other fortifications confirm the type. Simtoka-jong, described as the oldest fort in the country, retains its projecting ridge siting and central square tower, though in poor repair. Tashi-cho-jong presents a parallelogram form with sides parallel to the river twice the length of the other two, distinguished by two large gateways and a wide fosse filled with water on the west and north. The physical evidence of these structures—masonry walls, timber gateways, defensive towers, and internal court divisions—constitutes the primary archaeological record of Bhutanese architectural practice and evolution.³

2.1.3 The dzong as a living monument

The standing fabric of the monastery-fortresses serves as a primary document not only of architectural form but of active cultural practice. The dzong exemplifies how historical monuments remain in active use, accommodating the same political, religious, and logistic functions for which they were originally designed. This continuity of function distinguishes Bhutanese dzongs from most medieval European castles, which are relatively dead monuments. The traditional comportment of the Bhutanese people, reflected in patterns of traditional attire and conduct, contributes to a genuineness by which the past is represented in the present, making a visit to any dzong evoke a “medieval ambience” and rendering the monastery-fortress a “living” museum. The standing fabric thus reveals not merely historical form but cultural practice embedded in the building’s ongoing use.⁴

2.1.4 Reading the fabric: visual inspection as method

Treating the standing fabric as evidence requires a method for reading it. The 1991 UNESCO mission, undertaken from September to October, involved systematic visits to monuments and sites across ten districts—Paro, Chukha, Thimphu, Punakha, Wangdi Phodrang, Tongsa, Bumthang, Mongar, Tashigang, and Lhuntsi. The team conducted visual inspections together with discussions with local decision-makers, district administrators, owners, and caretakers, including district engineers and local craftsmen. This explicitly visual fact-finding process, combined with interviews with those responsible for the sites, revealed the common and salient defects in both structure and fabric across the monument corpus, proving effective in identifying conservation priorities and in sensitizing local stakeholders to the urgency of preservation.⁵

2.2 Documentation of the built fabric

If the standing fabric is the primary evidence, documentation is the means by which that evidence is recorded, made transmissible, and tracked through time. The documentary record for Bhutanese architecture ranges from the drawings and photographs of early travellers, through measured survey and photographic recording in conservation campaigns, to standardized inventory and digital systems.

2.2.1 Early visual documentation: the drawings of Samuel Davis

The earliest systematic visual record of Bhutan’s built environment was produced by Samuel Davis, who accompanied Samuel Turner’s embassy of 1783. His watercolours, pencil drawings, and wash-drawings constitute a systematic documentation of Bhutanese buildings at a critical moment in the kingdom’s architectural history, representing an early and sustained attempt to record them through measured observation and artistic representation. The drawings encompass fortresses, temples, domestic architecture, bridges, and landscape views, executed with attention to structural detail, proportion, and spatial relationships. They include plan, section, and elevation drawings—notably the “Plan Section and Elevation of the Bridge of Chains at Chuka” (1800), engraved by James Basire—demonstrating a technical approach that goes beyond picturesque representation to capture constructional logic and engineering principle.⁶

Davis’s originals, now dispersed among the Yale Center for British Art, the Victoria Memorial in Calcutta, the British Museum, and the India Office Library, form a foundational archive for the study of late eighteenth-century Bhutanese architecture. They were subsequently engraved and published, first in Turner’s Embassy (1800) and later in William Daniell’s Views in Bootan (1813) and in Hobart Caunter’s The Oriental Annual (1834–40), extending their circulation and influence. Because some engravings were executed by artists working from copies rather than originals, variations in fidelity were introduced. The drawings thus established a precedent for architectural recording in Bhutan and provide a visual baseline against which the standing fabric and its subsequent transformations may be assessed.⁶

The wash-drawings and watercolours, executed on the spot across the Thinphu valley and beyond, document domestic architecture, fortified structures, and engineering works with a precision that permits analysis of constructional logic and formal composition. The wash-drawings of village architecture near Tassisudon (plates 37–40) record the characteristic features of Bhutanese domestic building: tapering walls of pisé construction, shingle roofs, projecting wooden balconies supported on pillars, and the functional stratification of ground floor for animals and storage, middle floors for living quarters, and attic for fodder and grain. The phallic symbols hanging below the eaves, documented in these drawings, were noted as still present in many Bhutanese houses in the modern period, indicating the persistence of formal and symbolic conventions across centuries.⁷

The bridge at Wangdu Phodrang (Wandipore), recorded in multiple drawings (plates 45–47), provides detailed evidence of timber engineering: a structure composed entirely of fir, fastened by large wooden pegs without metal connectors, with three gateways—one on each bank and a third erected in the stream upon a wedge-shaped pier. The span of the first bridge measured one hundred and twelve feet and consisted of three parts of nearly equal length, with the centre raised considerably above the current. The drawings also record the fortified bridge-house, a structure of stone with projecting balconies and portcullis, together with its landscape setting. The survival of this structure in substantially the same form until the early 1970s, when it was demolished and replaced with a steel structure, confirms the durability and stability of the traditional timber construction as documented by Davis. The watercolours and wash-drawings of Wangdu Phodrang Dzong (plates 48–50) record the fortress-monastery on its rocky promontory between two rivers, with a round tower on a high eminence screening the main structure from view at a distance, preserving evidence of the spatial relationship between the dzong and its defensive outworks and its integration into the landscape.⁷

These drawings, acquired by the India Office Library and the Victoria Memorial in Calcutta and subsequently entering the Paul Mellon Collection at Yale and other holdings, were later engraved by William Daniell and published in various forms, including steel engravings in The Oriental Annual (1834–40) and in Italian editions of Turner’s account, though some engravings bore incorrect titles or simplified the compositional detail of the originals. Executed with topographical precision and attention to constructional detail, they remain among the most reliable documentary sources for Bhutanese architectural form and technique in the late eighteenth century, and provide a baseline against which later changes to the built fabric can be measured.⁷

2.2.2 Photographic documentation

Photography became an integral method of architectural recording in the early twentieth century. J. Claude White’s work in the Eastern Himalayas, presented in his 1910 paper to the Royal Society of Arts, demonstrates photography’s significance as a primary method for recording architectural form and detail; White was described in the discussion as a very fine photographer whose skill the audience would have occasion to judge. His photographic documentation of the built environment of Nepal, Sikhim, and Bhutan—presented as slides during the lecture—provided systematic visual evidence of architectural types, constructional detail, and ornamental treatment across the region.⁸

Accompanied by extensive photographic plates, White’s paper establishes photography as an integral tool for architectural documentation. His images record fortifications (the dzongs of Duggye, Paro, Tassicho, Poonakhaa, Angduphodong, and Tongsa), domestic architecture at various social scales, monastic buildings, and infrastructure including bridges, capturing both overall form and specific constructional and decorative features—roof projections, wall slopes, window treatments, and ornamental detail—making visible the coherence of the architectural tradition across building types and settlements. The systematic presentation of these photographs, organized by building type and location, suggests a deliberate methodological approach in which the images serve not merely as illustration but as primary evidence for the analysis of form, proportion, siting, and the relationship between buildings and their landscape settings. White’s dual role as engineer and photographer positioned him to document both the technical and aesthetic dimensions of the built fabric.⁸

Photographic documentation over extended periods provides crucial evidence for architectural transformation when images are compared diachronically. The built history of Punakha Dzong from 1783 to 1999 was reconstructed by comparing two sets of pictures depicting its morpho-typological evolution. The first set, viewing the dzong from its south/south-east elevation, includes depictions by Davis in 1783, Rawling in 1904, and Weir in 1931, demonstrating the dzong’s configuration across more than a century despite multiple fires and earthquake damage. A photograph by Philip Denwood taken in 1967 provided exclusive visual documentation of the dzong and its spatial setting, enabling detailed analysis of the overall layout and structural features. A second set of serial views from the late 1980s onwards documents the final stages of the reconstruction process. Such photographic sequences, organized and compared diachronically, reveal the morpho-typological evolution of architectural forms and the processes of demolition and renewal that characterize Bhutanese building practice.⁴

Photography also functions as a record of condition and of the conservation process itself. In the 1991 UNESCO survey, photographic records captured elevations, sectional conditions, and damage patterns—drainage failures at Tamshing, wall cracks at Chapcha dzong, timber decay at Rimochen, and erosion damage at Chörten Kora—taken from multiple viewpoints (southwest, northeast, southern, northern aspects) and integrated with written condition assessment to create a composite record linking visual form to material pathology and structural behaviour.⁹ In conservation work on wall paintings, the painted walls of the Tamshing Lhakhang were recorded photographically before intervention, after cleaning, after removal of over-painting, and after final intervention; this sequential photographic record tracked both the technical process and the progressive revelation of underlying original work.¹⁰

2.2.3 Measured survey and architectural drawing

Measured survey establishes the dimensioned, three-dimensional record on which analysis and conservation decisions depend. At the Dechenphug Lhakhang the conservation project (1996–1999) established a comprehensive preliminary record in its first phase: precise measured survey of the buildings and terrain levels, a topographic plan, a site model, and a physical soil study. Executed by the Special Commission for Cultural Affairs (SCCA) with the assistance of Yutaka Kato, an architect seconded to Thimphu by the Japanese cooperation agency, these operations provided the technical basis for all subsequent design decisions and became the official reference document for the execution of works (SCCA 1996). The measured drawings established the spatial composition of the monastery—the utse tower at 10 m square in plan and 16.60 m to the wall head, the Guru lhakhang with its external stair, and the service building—and the critical relationships between them across the sloping terrain. The topographic survey proved decisive in evaluating proposed modifications: it revealed that reconstructing the Guru lhakhang at a higher level, as local authorities initially proposed, would raise its roof to the height of the tower, fundamentally altering the carefully composed spatial hierarchy. The site model served to visualize and test design options. This practice of establishing a measured record before intervention proved critical to mediating between conservation ethics and local building tradition, providing quantifiable grounds for architectural argument where qualitative criteria alone had not sufficed to convince decision-makers.¹¹

At the Choedrak monastery, documentation exemplifies the application of traditional manual methods. The survey employed relatively simple tools—tape measure, plumb, and manual laser distance measurement—to capture the physical fabric; while this entailed some inevitable loss of information in the transmission from original to theoretical model, it remains a practical methodology for sites where more sophisticated instrumentation may be impractical or inappropriate. Documentation was understood as a means to determine the existing condition of a monument in a given time and space through the obtaining, processing, presenting, and recording of information, and the work incorporated oral histories and social and historical narratives to complement the architectural record. The measured drawings—ground floor plan, attic floors, first floor, third floor, and roof plan—establish the spatial organization of the three-story lhakhang as it responds to the steep site, while elevations document the tapering stone masonry wall and fenestration, and sections reveal the internal spatial hierarchy and the connection between the third floor and the cave shrine within the cliff. Photographic documentation captured both architectural detail and the landscape setting overlooking the Chumey valley. This body of documentation serves as the basis for future conservation planning and as a record of materials and techniques adopted in ancestral times, supporting capacity building of artisans and future site development.¹²

The Buli Monastery conservation project demonstrates documentation as a foundational step in intervention. A preliminary site visit by the consultant team, architects from the Department of Culture, and Bumthang District engineers established a conservation plan, followed by detailed documentation of the building by architect Karma Gelay and the Druk Heritage Consultancy firm of Thimphu. This revealed critical structural conditions: tilting decorative windows on the southern façade, distorted columns, sagging timber beams, and deteriorating wall paintings. Component-level inspection and documentation at the courtyard during the Rabsel removal assessed structural members and ornamental parts, distinguishing failed structural timber from intact decorative elements. This methodical recording of existing conditions—both before intervention and during disassembly—provided the technical basis for conservation decisions and the distinction between elements requiring replacement and those to be retained.¹³

Measured survey was likewise foundational to conservation of the Tamshing wall paintings. Prior to any intervention the site required careful measured survey to produce proper ground and upper floor plans at scale 1:50, sections with levels (especially those outside), and elevations of each wall at scale 1:10, work assigned to the SCCA Engineering Cell. The state of preservation and former interventions were recorded for each wall of the building, with documentation expanded and new plates added as removal of over-painting proceeded. At the Dechenphug Lhakhang the training group divided into specialized teams: one recorded the state of preservation of renderings and paint layer through systematic observation, a second documented the iconography and epigraphy of the paintings, and a third took measurements to establish a rough referential ground plan—integrating measured survey, photographic documentation, material sampling, and technical analysis into a comprehensive record of the fabric and its conservation history.¹⁰ In the 1991 mission, architectural drawings were prepared by district engineers, notably the plan and section drawings of Tongsa dzong’s southern zimchung section, which recorded structural damage in walls and wooden frames.⁹

2.2.4 Inventory and standardized recording

Beyond individual campaigns, the documentation of Bhutan’s monuments has been pursued through standardized inventory frameworks. The Division of Cultural Property, constituted within the Special Commission for Cultural Affairs, undertakes the recording of all cultural properties through files and photographs. A model questionnaire for inventorying a building and a model inventory index card for movable objects in temples, chapels, and private houses were developed as standardized documentation tools. The proposed strengthening of the Division included a Photographic Section equipped with special cameras to photograph mural paintings, a Survey Section employing architecture, topography, and photogrammetry, and a Documentation Section housing a library and a system of archives of old photographs, plans, drawings, and recorded interviews. A reference volume containing all monuments visited during the 1991 mission, giving their principal characteristics, could be obtained from the Sector for Culture, Division of the Physical Heritage at UNESCO, indicating that comprehensive measured documentation had been undertaken; topographic equipment and a vehicle for field surveys were identified as necessary for systematic work.⁵

The inventory framework was specified in detail. Study tours organized with Division personnel—engineers, architects, and craftsmen—were to include the taking of measurements, the preparation of plans, drawings, sketches, and photographs, and documentation compiled by interviewing local people and viewing historic documents and chronicles. A preliminary inventory was to be prepared by a local institution or person, with the advice of the local people who use the building heard, before a formal inventory by the SCCA described the building and presented the issues, a balance to be found between the two approaches. The model questionnaire prescribed systematic recording organized by building definition and type; localization, environment, altitude, and distance to settlements; description of dimensions, plan, utilization, and style; cultural and historical elements; religious and cultural aspects; architectural type; construction details of foundations, walls, roofs, external and internal elements, and upper storeys; present state of conservation; structural condition; technological defects; and cost estimation. For movable objects—paintings, statuary, ritual objects, musical instruments, books, carved woodwork, masks, and craftspeople—separate index cards recorded material, dimensions, iconographical data, inscriptions, state of preservation, and place of deposit. The collecting of historical documents and written and oral archives was emphasized as particularly important: inscriptions in entrance porches or near altars recording construction or restoration dates, lists of donors, and names of monks in charge; publications such as biographies of lamas, descriptions of pilgrimages or sacred places, and documents of local history; lists of former clergy arranged chronologically; and accounts kept by the secretary of the village assembly and village archives. Interviews with craftsmen and foremen acquainted with the materials used were judged a great asset. Such data were valued not only for immediate preservation but also for the establishment of a general inventory of religious culture in Bhutan.¹⁴

2.2.5 Digital documentation and inventory systems

Documentation practice has more recently turned to digital systems capable of consolidating and managing the accumulated record. A workshop held in Bhutan in August 2014 focused on approaches to heritage site documentation, emphasizing photographic and three-dimensional recording alongside the application of GIS systems. Much existing data in Bhutan consisted of paper-based records together with conventional photographs and drawings, a substantial archive requiring systematic organization and digitization. The development of a digital inventory system—specifically the ARCHES platform—was designed to accommodate the rapid addition of existing data through the ability to import and attach scanned materials including PDF documents and images. While this approach was acknowledged as not ideal in terms of search-facility integration, it represented a pragmatic medium-term strategy, allowing heritage institutions to preserve and make accessible the documentary record of standing monuments; the system’s capacity to handle multiple records reflecting point-in-time condition assessments and management actions over time demonstrates the role of documentation in tracking the physical fabric through its conservation history. This emphasis on digital documentation reflects the broader recognition that the standing fabric itself—the existing monuments, buildings, and structures—constitutes the primary evidence base, with the inventory system serving as a repository for its systematic recording in support of both scholarly analysis and heritage management.¹⁵

2.3 Art-historical and iconographic analysis

Beyond recording the fabric, the architectural record can be read for its iconographic programme—the disposition of images and ornament through which the building expresses cosmological and devotional meaning. Samuel Davis’s observations of Bhutanese religious architecture and ornament provide early documentation of this programme as integral to the built fabric. His account of the chapel interiors at Tashichö Dzong records the disposition of images within the devotional space: the colossal gilt figure of Syatoba (Sakyamuni) seated cross-legged as the supreme deity, attended by a smaller figure identified as his principal agent or vizier, with rows of diminutive images of former Lamas arranged above, and the destroying power placed lower in front, characterized by an enraged countenance and numerous uplifted arms bearing weapons. This hierarchical arrangement of sculptural forms within the altar composition establishes the cosmological order as a three-dimensional architectural fact.¹⁶

Davis also recorded the ornamental vocabulary applied to structural elements: painted ornaments on pillars and walls executed chiefly in flowers and dragons in the Chinese taste, with bells suspended from the corners of the roof. The wayside shrines he described—square structures with either pictures of the deity visible through gratings or figures cut in slate relief and fixed in rows near the top—demonstrate the integration of image-making with architectural form. The prayer-wheels he documented, whether hand-turned or powered by water-wheels below, carry the sacred syllable om mani padme hum inscribed in relief on stone and printed on paper rolls within the barrel mechanism, making the ornamental and functional apparatus inseparable from devotional practice.¹⁶

The architectural translation of cosmological doctrine appears in Davis’s account of the Rajah’s explanation of the universe: the celestial regions situated on the summit of a square rock of immense magnitude, its sides composed of crystal, ruby, sapphire, and emerald, with the sun and moon placed on opposite sides revolving to give day and night to the lower world. This schema, rendered in wall paintings within the dzong, establishes the proportional and directional logic by which the building itself may be understood as a three-dimensional mandala or cosmological diagram.¹⁶

2.4 Technical and scientific methods

Technical and scientific analysis complements art-historical and visual examination by establishing the material basis of the architectural fabric—the composition of pigments, plasters, and coatings, the integrity of substrates, and the chronology of construction—revealing information invisible to inspection alone.¹⁷

2.4.1 Material analysis of wall paintings: pigments and coatings

Laboratory-based analysis of materials used in post-Zhabdrung temples has yielded compositional information about pigments and coatings. Pigment sampling from Tamshing Lhakhang (built between 1501 and 1503) identified abundant mineral colours including red lead, cinnabar, orpiment, azurite, brochantite, and red iron oxide. Analysis of paintings in Chuchizhey Lhakhang in Semtokha (built between 1629 and 1631) detected cinnabar, white lead sulphate, and copper sulphate. Paintings from the 1650s in Chorten Lhakhang in Tongsa dzong contained azurite, cinnabar, and red iron oxide. These analyses demonstrate the enriched palettes achieved through mineral pigments in historical wall paintings. Coating and glazing analysis has proven particularly informative: Shekede and Rickerby found selective coatings and glazes featured heavily in Bhutanese art, applied over paintings in multiple temples including Chuchizhey Lhakhang, Tamshing Lhakhang, Chorten and Lama Lhakhang in Tongsa dzong, and Utse Gorika in Gangtey Gonpa. Identified as coloured organic glazes, these functioned to give translucency and unification to the painted surfaces.¹⁸

Technical analysis also guides the choice of conservation materials. At Tamshing, a sample of the white priming layer applied during a nineteenth-century over-painting intervention was taken for chemical analysis to identify its components and determine safe solvents for removal. Testing revealed that this layer was soluble in a somewhat basic water solution (1% ammonium bi-carbonate solution) but reacted with air to become nearly insoluble if not immediately removed after application. Cleaning tests on selected areas of the east circumambulatory corridor demonstrated that the over-painting had somewhat preserved the original paint layer beneath, which appeared blackened and covered by thick layers of grime; some areas on the inner wall were covered by a blackish substance requiring different solvents not available during trials. These trials informed the choice of conservation methods: an inorganic fixative such as ethyl silicate was proposed to fix flaking and scaling paint layers, minimizing the use of synthetic organic fixatives that block porosity and prevent proper water-vapour exchange.¹⁰

2.4.2 Laboratory and imaging techniques

The study of Bhutanese wall paintings demonstrates the value of technical and scientific analysis as a complement to visual examination. A three-year investigation of original materials and techniques, undertaken between 2008 and 2010 by the Conservation of Wall Painting Department at the Courtauld Institute of Art in collaboration with Bhutan’s Department of Culture, established protocols for understanding the physical nature, deterioration processes, and conservation risks of the painted architectural fabric.¹⁷

The methodology combined in-situ examination with laboratory analysis. Portable microscopy and ultraviolet imaging were deployed on site to examine over 40 wall painting schemes without removal of material, and over 100 microsamples were obtained for analysis, with archival and field research into traditional dyes and pigments providing context. Laboratory examination began with binocular microscopy at 10–45× magnification, followed by cross-sectional mounting in polyester embedding resin and stratigraphic analysis using optical microscopy at 100–500× magnification, including ultraviolet examination. Individual particles were mounted as dispersions for detailed characterization, and micro- and histochemical testing was carried out on particles and cross-sections. Scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEM-EDS) provided elemental analysis of selected samples, and samples of earthen supports were subjected to optical petrography and semi-quantitative mineralogical analysis using X-ray diffraction (XRD).¹⁷

This layered approach proved essential to understanding the coherence of Bhutanese painting technology. Stratigraphic analysis revealed the sequence and composition of ground layers, paint layers, and selective organic coatings—information invisible to visual inspection alone—while cross-sectional photomicrography documented the precise superposition of materials and their interaction. Particle characterization and elemental mapping distinguished between pigments of similar appearance but different composition and origin, and the analysis of earthen supports through petrography and XRD established the mineralogical character of plaster layers and their likely sources, contributing to understanding of local material practices and regional variation. The investigation also revealed conservation risks that visual examination would not identify: organic glazes and coatings, applied selectively over gilded and painted passages, often darken or lose translucency over time and become vulnerable to inadvertent removal during cleaning; paint-layer exfoliation was found to correlate with the presence of selective organic coatings, indicating inherent susceptibility to environmental deterioration. The identification of industrially produced materials—synthetic pigments, bronze powder, aniline dyes—in later schemes documented the historical transition from traditional to imported materials and enabled assessment of their permanence and conservation implications.¹⁷

Subsequent work has extended the range of techniques. The Courtauld Institute of Art at the University of London completed a research project on the original materials and techniques of wall paintings in Bhutan in July 2012, employing scientific methods to characterize pigments, binding media, and preparation layers. Ground-penetrating radar has been applied to detect delamination in wall paintings, enabling non-invasive assessment of paint-layer integrity and substrate condition. Tibetan wall paintings have been investigated through analysis of materials and techniques, including DNA analysis of proteinaceous binding media, which permits identification of organic binders and their degradation pathways. Sampling of pigments and systematic testing of artist palettes provide empirical data on the range of colorants in use. These investigations support art-historical interpretation by establishing the material basis of artistic practice and the chemical composition of traditional pigment mixtures.¹⁹

2.4.3 Dating and chronological anchoring

Scientific methods also provide chronological anchoring for architectural remains. Carbon dating of timber from the ruins of Tsenkharla fortress, associated with Lhase Tsangma, traced the wood to the 1430s, establishing a terminus for the consolidation or reconstruction of this legendary structure.¹⁸

3 Materials, Construction, and Building Practice

If the standing buildings are the primary evidence, this section examines what they are made of and how they were made. Its concern is the physical constitution of Bhutanese architecture—the materials, structural logic, and human practices through which form is brought into being—and its guiding question is why these buildings take the shape they do: how far their character follows from the conditions of the Himalayan setting, the available palette of materials, and the constraints of a particular building technology. The section moves from the general to the specific and then to the human. It begins with the environmental determinants of design—topography and altitude, the monsoon climate, and seismic instability—repeatedly identified in the sources as the reasons Bhutanese building diverges from the Tibetan prototypes it descends from (3.1). It then sets out the material palette of earth, stone, timber, bamboo, and their allied crafts, together with its regional variation and its transformation in the modern period (3.2), and analyses the structural systems that combine massive load-bearing walls with a timber frame assembled almost wholly by joinery (3.3). A dedicated treatment of seismic behaviour assesses how these traditional systems perform under earthquake loading and how modern repair has affected that performance (3.4). The section closes with the building process itself—the conceptual trinity of patron, ritual master, and master-builder; design without drawings; the organisation of labour; and the transmission of craft knowledge through apprenticeship and divine lineage—so that the material fabric is understood not only as a set of techniques but as a social and ritual practice (3.5).

3.1 Environmental determinants of design

Bhutanese building begins from the conditions of its setting. Three environmental factors recur across the sources as the constraints that shape form, material, and siting: the mountainous topography, the monsoon climate with its heavy and concentrated rainfall, and the seismic instability of the Himalayan belt. Together with the local abundance of timber, these conditions are repeatedly identified as the reasons that Bhutanese architecture diverges from the Tibetan prototypes from which much of it descends.

3.1.1 Topography and altitude zones

The country is mountainous in the most emphatic sense—not an intermixture of hills and valleys but a country of mountains—with consequences for settlement siting, communication, and the engineering of infrastructure ⁶. Level ground is scarce and valuable, a fact that directly influences building practice, for example in the preference for ladders over stairs, which take up less room ²⁰. The topography does not lend itself to lengthy constructions, an influence visible in the relatively few and fairly short stone walls found throughout the country ²¹.

Several sources organise the terrain into altitudinal zones that condition where and how people build. Bhattacharyya describes three physiographic zones—Himalayan foothills (to 1,500 m), inner Himalaya with flat valleys (1,500 to 4,500 m), and alpine regions (above 4,500 m)—and notes that the Black Mountain Range demarcates western from eastern Bhutan, creating distinct environmental and cultural zones that influence building practice ²². Herrle distinguishes lowlands at about 200 m, central mountains reaching 4,000 m, and glaciated ranges exceeding 7,000 m; the central region, where most documented houses stand, is characterised by partly forested north–south ridges separating valleys connected only by trails over passes above 3,000 m, a fragmented topography that has historically constrained settlement patterns and building traditions to local material availability and microclimate adaptation ²³. Jest records terrain rising from less than 100 m in the south to over 7,000 m in the north within 100 to 140 km, with most of the population living between 1,000 and 3,000 m ⁵. Lall’s account describes a country of 46,000 sq. km with sub-tropical, temperate, and alpine-arctic zones, crossed by five north-to-south flowing rivers that descend from eternal snows to the tropics within little more than 100 km; the temperate central portion (1,600 to 2,600 m) contains the principal valleys and largest settlements and thus constitutes the primary zone of architectural development, while the well-forested south and southeast receive adequate rainfall and the northern region rising to the Himalayan watershed is sparsely inhabited by shepherds in summer ²⁴.

Within this terrain, the favoured site for monasteries and temples is the top of a spur above the valley floor, commanding magnificent views—a choice reflecting both environmental opportunity and the tradition’s integration with landscape ⁵. Davis’s late-eighteenth-century account describes the valley of Tashichö Dzong (Tacissudon) as about five miles long and a mile broad at its widest, entirely surrounded by high mountains through which the river Thinchu passes, its low grounds near the river covered with rice artificially irrigated by springs conducted from the surrounding mountains; the elevated capital is judged healthy in every season, with no place where water can lodge and become stagnant ⁶.

3.1.2 Climate and precipitation

The climate is marked by extreme diversity. One reference observes that the intense cold of a Siberian winter, the heat of the Sahara, and the mild weather of Mediterranean Italy may all be experienced in a single day’s journey in Bhutan; in high-altitude regions peasants maintain two sets of farms and pasture grounds to manage seasonal variation, implying architectural provision for dual occupation patterns ²². The humid monsoon winds from the Bay of Bengal influence the whole country; in the midlands, where many surveyed houses stand, winters are cold with mean temperatures of −5 °C while August reaches 20 °C, and annual rainfall varies from 1,400 to 2,200 mm—conditions that directly inform roof overhang, wall thickness, thermal mass, and the integration of animal husbandry within the building envelope for winter warmth, a practice now constrained by recent government regulation ²³.

The seasonal rhythm was described in detail by eighteenth-century observers. The rainy season sets in early in June, bringing constant precipitation; over seven or eight days at lower elevations showers fall in some part of the twenty-four hours, hilltops are constantly in cloud, and rivers and torrents swell, though roads are rarely impassable except for short periods caused by bridge demolition or earth slips, which are soon repaired. About the middle of September the wet season ends and fine weather continues until November, when snow begins to whiten the mountains ²⁰⁶. The dry season brings sharp mornings and evenings, requiring quilts, blankets, and greatcoats even in warmer months ⁶. This climate drove seasonal migration: the Rajah and his attendants retired from the elevated capital at Tacissudon to the milder Ponaka (Punakha) valley in winter ⁶, and well-to-do households maintained property in two ecological zones—Thimphu in summer and Thed, the valley of Punakha and Wangdi, in winter—a transhumance that shaped the distribution and character of settlements across altitude zones ²⁵.

The architectural consequences of heavy and concentrated rainfall are emphasised throughout. The abundance of precipitation, combined with abundant timber, fundamentally shaped Bhutanese forms and distinguished them from their Tibetan prototypes: the traditional Tibetan flat or gently pitched roof proved inadequate, and the perched roof covered in wooden shingles and weighted with stones developed as a direct adaptation to heavy rainfall, creating an impression of lightness that contrasts with the more massive Central Tibetan architecture ²⁶. The same sources describe the pitched roof above a flat floor as an innovation made necessary by rain and snow ²¹, and treat the management of substantial rainfall, together with timber availability, as having driven roof and structural innovations that are completely original in character ²⁷. White makes the relationship explicit, attributing the deep projections of Bhutanese roofs to the very wet climate, and contrasting them with the flat roofs that Tibet’s scanty rainfall and scarcity of timber make possible ⁸. Lall similarly contrasts Bhutan’s generous rainfall with the aridity of Ladakh: where rainfall is more generous, earthen-walled structures are capped and protected by a sloping wooden roof that appears lightly perched and provides protected storage for fuel and fodder, differing markedly from the flat-roofed approach of dry climates ²⁴.

Climate also conditions fenestration. Window size is reported to be inversely proportional to altitude: in rice-growing subtropical places, third-floor windows take the graciously oversized gesar go form to admit maximum light and breeze, which prevents the propagation of moths and the growth of mould in the warm, humid climate, whereas in high-altitude areas third-floor kitchen windows are minimal, designed to block winter chill; shrine rooms maintain adequate illumination regardless of altitude, as coldness is not a primary consideration in spaces little used for sleeping ²⁵. The eighteenth-century observation that lower stories lack windows and rely on projecting balconies rather than fenestration is likewise read as a response to the need to maintain structural integrity in a climate of heavy moisture and seismic activity ²⁰.

3.1.3 Seismicity and ground instability

Bhutan lies in a major seismic belt and experiences a monsoon climate with heavy rainfall concentrated in a very short period; these conditions directly determine architectural responses, as the infiltration of rainwater causes structural damage, earthquakes present a constant threat, and the steep terrain influences siting and foundation design ⁵. The absence of windows in lower stories and the reliance on projecting balconies are read as serving structural integrity under both heavy moisture and seismic activity, alongside the pronounced inward slope of walls, which contributes both to stability and to the shedding of water ²⁰. The detailed treatment of seismic performance and resilience is given in Section 3.4.

3.1.4 Architectural responses to the environment

The recurring architectural responses to this environment can be summarised as a coherent set of adaptations. Roofs are built with little slope, covered with shingles held down by large stones, and projecting considerably beyond the walls—a system adapted to heavy precipitation; walls are given a pronounced inward slope that aids both stability and water-shedding; lower stories omit windows in favour of projecting balconies; and ladders replace stairs where level ground is scarce, an inconvenience felt less where only men must climb them ²⁰.

Water supply was itself a persistent environmental challenge that shaped fortress design. There is no written, archaeological, or folklore evidence of wells or cisterns, yet a water supply would be essential; at a number of dzongs built above rivers the solution was a covered way, loopholed and reinforced with round towers, leading down to a water source—either a river or a spring over which a round tower known as the chudzong or river tower was built—the best example being at Jakaryugel dzong, while dzongs near rivers were further protected by cantilevered bridges of squared pine logs defended at each approach by a three- or four-storeyed loopholed tower ²⁸.

3.2 The material palette

Bhutanese building draws on a limited set of locally available materials—earth, stone, timber, bamboo, and clay—organised into a coherent constructional hierarchy in which each material performs a distinct structural and aesthetic role. The most general statement of this hierarchy is that mass and stability are provided by earth or stone, frame and ornament by timber, with roofing and surface finishes completing the system ⁸²⁴. The choice between earth and stone is strongly regional (see 3.2.9), and the system as a whole has changed markedly in the modern period (see 3.2.10).

3.2.1 Earth: rammed earth (pisé)

Rammed earth—known locally as gyang (a Tibetan term)—is the primary structural material of Bhutanese farmhouses and the commonest building material for village houses in western Bhutan, dominant among well-to-do households throughout the country until the mid-twentieth century ²⁹³⁰³¹. Walls are typically about three feet thick at the base, where they rest on stone foundations, and taper slightly upwards; in the western house, compacted-earth walls of exceptional thickness—80 to 100 centimetres—are reported to produce an extremely strong, rigid, and durable structure ^29303233.

The construction technique is consistent across accounts. Two lines of planks are set on edge atop the foundations and held by wooden bars; teams of workers—typically women and girls—pour earth between the planks and ram it hard with long rammers to the rhythm of special songs; after several hours of pounding the planks are raised to rest on pegs driven into the completed layer, and the next layer of two to three feet is rammed in turn. The junctions between layers and the holes for the pegs remain visible on the finished building, articulating the large expanses of blank, light brown-coloured wall ²⁹³⁰. The western variant describes a wooden frame filled with damp mud and pounded by wooden poles fitted with flat rams, a labour-intensive process performed by teams of women that may extend over several weeks for a large house, after which the wall is left in its natural colour or whitewashed ³²³³.

Ura provides the most detailed technical account. Rammed earth originated in Tibet and depended on a soil composition suited to compaction and adhesion; western Bhutanese soils of Paro, Thed, and Thimphu, composed of sand and brown clay, proved optimal. A practical test threw a fistful of mud against stone to check adhesion; more precisely, suitable soil required roughly 70 percent sand and gravel to 30 percent clay, and organic content weakened both adhesion and compaction, making most eastern Bhutanese soils less suitable ³¹. Soil was compacted with heavy wooden tampers (tegshing), the acoustic signature of compression—from 'bhog bhog' through 'dhuru, dhuru' to a final 'tara, tara, tara'—serving as an auditory measure of adequate compaction; wooden shuttering frames were fitted and removed as work progressed, each adjusted to taper by a thread’s thickness above the previous one, producing the characteristic exterior taper ³¹. The resulting walls achieved remarkable hardness: a British observer in 1839 noted that rifle bullets fired from eighty yards indented the surface only superficially and were themselves flattened, walls typically measuring thirty-six inches thick, later compromised to twenty-four inches to preserve internal space ³¹.

Structural assessment confirms rammed earth as the load-bearing material, with strip footings of random rubble masonry and mud mortar at the foundation (latterly substituted by cement) and timber as the secondary system; finite-element analysis records a Young’s modulus of 45,000 kN/m², a Poisson’s ratio of 0.22, and a density of 19.6 kN/m³ for rammed earth, against far higher stiffness for the stone masonry of the base (Young’s modulus 1.65 × 10⁶ kN/m², density 25 kN/m³). The exposed earth surface is finished with lime paint for weathering protection ³⁴. A related composite technique, shaddam (weave-mud), uses a timber frame filled with woven bamboo and plastered with mud for internal walls and portions of external walls; one source treats shaddam as a form of compacted earth, while another applies the term specifically to the bamboo-and-mud weave ³³³².

3.2.2 Stone masonry

Stone is the primary structural material for dzongs, lordly residences, and important temples, and the preferred wall material of village houses in central and eastern Bhutan ²¹²⁷²⁶. Davis described the walls of Tashichö Dzong as stone and clay, built thick and with a greater inward slope than European practice, rising to three stories ¹⁶²⁰; the castle of Chuka was of stone of prodigious thickness, and the houses at Murichom were of stone with clay as cement, square in form, narrowing from foundations to top ⁶. Buildings are constructed substantially of blocks of granite, limestone, and other locally available rocks combined with mud mortar ²².

In monuments the walls are of dressed mica-schist stones bound by earth mortar, with thickness decreasing from bottom to top and outer faces slightly tapered ⁵. The mud mortar, rather than the stone itself, is the moisture-sensitive component: the stones are described as almost non-porous, so that most moisture is borne by the bedding material between them ¹⁴. Herrle’s survey of the Ura stone house records foundations (tsipkijam) varying between 30 cm and 2 m deep depending on soil, with a consistent 80 cm width, and walls (tsigpa) 61 cm thick for two-storey buildings and 71 cm for larger structures; two mortars are used—earth (dam) without additives for masonry, and a plaster mortar (dam kar ti) mixed with cow dung for filling the timber framework of the rabsel together with woven split bamboo (zag pa). Foundation stones were traditionally dug locally and are now sourced by tractor from village quarries ²³. At Dechenphug the utse tower employs massive stone walls in earth mortar with pronounced batter (fruit), rising 16.60 m ¹¹, and at the Choedrak lhakhang the stone walls taper from 1.7 m at ground floor to 1.1 m at the third floor ¹². Dressed-stone construction in the dzongs may be attributed to craftsmen from Tibet, in contrast to the rammed earth of the farmhouse ²⁹³⁰. White records that the masonry of Bhutanese fortifications and domestic structures is well built ⁸, and that at Punakha a massive masonry wall runs from river to river, with substantial cantilever bridges strengthened by heavy timber gateways studded with iron ³.

Stone also appears in earlier and megalithic forms: the finely dressed stone pillar at dKon-mchog-gsum, set on a stepped plinth and incised with an eight-petalled lotus, demonstrates the adaptation of pre-Buddhist stone-working to Buddhist purposes ².

3.2.3 Timber

Timber forms the second major material system and is used extensively for the inner structure, roofing, framing of upper storeys, and ornamental work ⁵⁸. The timber used is chiefly fir, the largest planks suggesting trees of considerable size, and the so-called Bhutanese Pine—apparently identical to the Blue Pine of Kashmir—supplies square-sectioned timbers and floor-planks ²⁰²⁹³⁰. A defining feature of the tradition is the working of timber entirely by hand: the saw was altogether unknown, beams and planks being hewn to shape, and trunks transformed into square section by what is essentially carving, a method wasteful of wood but feasible given plentiful supply ¹⁶²⁹³⁰. Ura notes that the basic tools were the dagger and axe, that saws were not in common use before the 1970s, that wood was split by wedges and fashioned without metal nails, and that fine joinery depended on the skill of the craftsman rather than the sophistication of tools, the angular tip of a well-forged dagger being the most valuable implement ³¹. The men of a household hewed and trimmed timbers for floors, roof, and upper storeys using long straight knives and axes ²⁹.

Joinery is executed without metal: beams are put together with mortises and tenons, and boards joined by pieces let in across and dovetailed, with not a nail, bit of iron, or even a wooden pin appearing in the frame, yet the work is not deficient in firmness or stability (the implications for the structural system are developed in 3.3.2) ¹⁶²⁰. The complexity of window and door assemblies is such that the work is done at ground level and the finished elements fitted into the upper walls later; lintels and window frames are painted with floral or geometric designs and carry symbolic meaning ²¹²⁷. Doors are artistically carved and pivoted without nails or iron hinges, windows are of the sliding type painted with earth-colour floral designs, and ladders are often cut from single pieces, while well-appointed houses feature decorated staircases ²². The upper storeys are built not of earth but of a wood framework jutting slightly outward and filled with thin wooden panels, broken by narrow window-lights with trefoil-shaped tops that close with sliding shutters ²⁹³⁰. Timber elements—posts, beams, joists, and ornamental window frames (rabsey)—commonly receive polychromatic treatment as integral ornament ¹¹. Floors are constructed either of boards or of pebbles well cemented together ²⁰.

The durability of timber under Bhutanese conditions is attested by the bridge at Wangdu Phodrang, documented as composed entirely of fir pinned together by large wooden pegs, which stood exposed to seasonal weathering for nearly a century and a half without preservative and showed no symptoms of decay ⁷. Conservation evidence both confirms and qualifies this durability: at Buli Monastery timber members were treated with bitumen coatings against decay, yet wood-rotting fungi attacked timber bases where dampness and lack of air circulation prevailed ¹³.

3.2.4 Bamboo and other regional materials

In the southern foothills and lower altitudes thatched bamboo predominates, while at very high elevations simple stone structures and yak-hair tents serve as shelter ³². In eastern Bhutan woven bamboo mats were used for building and as roofing for small houses on stilts (pilotis) ²¹²⁷²⁶. Bamboo lathing (lattis) fills the spaces of the wood framework of upper storeys, covered by whitewashed render ²⁶²⁷, and in the rabsel framework woven split bamboo (zag pa) fills the panels (shamig or ekra) covered with mud plaster ²³. Slate, an abundant resource, is finely engraved with images of deities and serves both functional and decorative purposes, particularly as flagstones ²⁷.

3.2.5 Roofing

Roofing throughout the tradition employs wooden shingles laid with little slope, projecting beyond the walls, and held down by large stones—a system compared by Davis to Portuguese tile-fastening in Madeira ¹⁶²⁰, and noted by several sources as secured by heavy stones against both precipitation and wind loads ²⁶³²²⁸. Roofs are composed of fir boards or pine shingles placed on cross beams and joists, sometimes held by stones and strings of wild creeper ⁶²². The shingles (panglep) are riven from fir (Tsuga dumosa) into widths of about 15 cm and lengths of about 1 m, laid on battens and originally held by stones; because they warp, each must be turned head to tail after the first year ¹⁴.

Reported lifespans vary: pine shingles are said to last 3 to 7 years without preservatives, particularly at Wangdi Phodrang ⁵; one set is said to require replacement every three years, prompting widespread adoption of corrugated sheet metal ³³³²; and Ura reports a set of fir shingles (zhar, shingleb) lasting about twelve years if turned after six, with durability enhanced by chimney smoke rising through the attic—smoke that contributed to respiratory illness but preserved the roofing ³¹²⁵. Bringing fir shingles down from the forests required a mass of community labour to transfer them out in a single day ²⁵. Dzongs received the thickest roofing—four layers of shingles weighted with stones at either end to prevent rattling and wind damage—while legendary cypress shingles were claimed to last a century without replacement; the Ngoducholing temple retains its cypress roofing, now concealed under corrugated iron, and three grand houses along the Punakha River had cypress roofing with lumber fortuitously floated down by the river ³¹²⁵. A consistent feature is the absence of guttering, so that water drainage relies on the roof pitch alone, creating wet conditions at entries during rain unless plastic gutters are retrofitted ³³. Modern substitution of timber shingles with galvanised iron covering (GIC sheets) and cement-asbestos plates has created waterproofing failures and accelerated decay of underlying timber ⁹.

3.2.6 Iron and metalwork

Iron, bronze, and copper supplement the earth-stone-timber palette. Davis recorded that the widest river in Bhutan was crossed by an iron-chain suspension bridge at Chuka, a number of iron chains supporting a matted bamboo platform with a bamboo fence on each side, the platform laid loosely on the five chains to allow play with the swing of the bridge, piers being almost totally excluded on account of the unequal heights and extreme rapidity of the rivers ⁶.

Bhutan was a significant source of iron and a centre of bridge-chain technology. Thangtong Gyalpo imported large quantities of raw iron from Bhutan to Tibet in 1434—7,500 horse loads according to various sources—with Paro blacksmiths forging 7,000 chain links, 1,400 horse loads of fifteen links each transported to Tibet, and 1,084 units brought to Phari; the Haa valley is noted as where he first forged chains for suspension bridges in 1433, and the red ferrous rock at Tamchog Lhakhang in the Paro Chhu valley indicates local iron deposits ³⁵. Iron production relied on ore from such locations as Chakor La at Geynekha (Thimphu) and Barshong at Khaling (Tashigang), extracted by digging to depths comparable to the height of a traditional building and transported in bamboo baskets; furnaces were square with round holes at the corners to release molten iron, fired continuously for periods from one week to one month, with fuel wood directly affecting iron quality (oak and certain species producing superior grades) ³⁶. The highest technical achievement was the forging and welding of chain links: repeated heating, forging into rectangular sticks, forming into links, and final diagonal welding at about 1,400 °C—nearly liquid-iron temperature—using arsenic as a flux, an innovation producing steel of extraordinary quality, highly strain-resistant and largely corrosion-free to the present day. Metallographic study at ETH Zürich (1978/79) confirmed forging from rods of varying carbon concentration that absorbed carbon in coal fire to become harder steel, with the arsenic-bearing weld film otherwise known only from Roman sword-making, a composition of roughly 2 percent alloys and 0.012 percent carbon. Five distinct link types are identified, of which type 2 (outside lengths 15–40 cm, widths 5–8 cm, cross-cuts about 1.7 × 2.5 cm) appears in all bridges directly traceable to Thangtong Gyalpo ³⁶.

Bronze casting is attested early and as an institutional practice: a bronze bell (cong) at dKon-mchog-gsum, cast by Tang-dynasty foundrymen in the 8th century, established a form that persisted in later Tibetan temple bells ²; foundries operated at Punakha, Simtokha, and Thimphu in the sixteenth and seventeenth centuries, the Punakha foundry said to have begun in the early sixteenth century, drawing on traditions from Kham (Degi, Chamdo, Reo-chi) and on the Indian bronzes Sharli, U-li, and Nupli and the eleventh-century “yellow bronze” Kadam Lima of Atisha ³⁷. The golden turret (sertog) crowning the Choedrak roof was cast in bronze ¹². Copper, prized for being free from rust, was used for the main water cauldron, manufactured at Kalimpong near Dalikha dzong and carried long distances; those unable to afford copper used wooden and bamboo buckets, and water was channelled over long distances through wooden pipes assembled from grooved tree trunks, troughs, or lengths of bamboo lapped over one another ²⁵. Iron also reinforced infrastructure in smaller ways: the mountain road near Chuka was held to a precipice by iron pins and cramps ⁶, and timber gateways at Punakha were studded with iron ³.

3.2.7 Plasters, renders, and pigments

Wall surfaces are whitewashed inside and out, conventionally marked by a red stripe a little below the roofline ²⁰; this band, the khemar, runs along the upper walls and is read as symbolising the celestial paths of the sun and moon, an integral element of the architectural expression rather than mere ornament ¹², and where painted red madder it denotes a religious function and contrasts with the light grey clay-coloured walls (the Khemar band of Harrison’s account) ²⁸. Inner walls are plastered with clay and painted with murals, the total mural area in a single major structure such as Simtokha dzong reaching about 560 square metres ⁵.

The plaster system itself is a layered stratigraphy. Over a structural base of river-stone boulders bound with mud mortar lie two to three layers of mud-based rendering, a thin yellowish priming layer, and the paint layer, polished—perhaps with river boulders—for compactness and shine ¹⁰. Ura describes a reddish-mud base of clay and sand to which fresh dung from forest-grazed cattle was added for adhesion, applied 5 to 7 cm thick to moistened stone walls, followed by four or five successively thinner applications each dried two to three days; a whitish finish mud (likely rich in calcite and kaolinite, mined at Gedu and Poengernang) was rubbed to a water-resistant shine, and mortar was strained through cotton cloth to remove particles that would otherwise leave cavities ¹⁸. Bhutanese wall painting was executed on dry plaster, unlike European fresco on wet lime; watercolour on dry walls lasted longer than on canvas, which was treated with white clay and hide glue, pasted with wheat paste, and protected against fungus and worm by a concentrate of Sichuan pepper, the critical requirement being an absolutely dry plaster surface beneath ¹⁸.

A more technical reconstruction of pigment history is given by Shekede. The typical pre-nineteenth-century scheme comprised a coarse lower levelling layer over stone rubble and a smooth upper plaster a few millimetres thick, both dominated by mica, quartz, and minerals possibly derived from granite, as analysed at Tamzhing Lhakhang (completed by 1505, the country’s earliest surviving scheme); over a yellow-ochre ground, pigments were bound in a proteinaceous medium, probably hide glue, the Tamzhing palette using expensive cinnabar, orpiment, and azurite sparingly alongside economical indigo-based pale blue, ochres, and dark grey ¹⁷. By the seventeenth century the palette had grown more sophisticated while keeping the earthen support: at Simtokha Dzong (1629–1631) white lead sulphate was used in the ground (suggesting direct material influence from Ming China) and brochantite was applied over malachite, with selective organic coatings to harmonise tonality and model flesh tones, reaching a pinnacle of virtuosity at Tango Monastery’s Gyalsey Zimchung (1689) ¹⁷. The nineteenth and twentieth centuries brought a fundamental shift: from the 1830s cheap Indian commercial goods including cloth and industrial pigments arrived, cloth became a secondary support concealing wall cracks, and by about 1905 at Jakar Dzong painting directly onto earthen supports was becoming obsolete; “gold” powder proved to be copper-zinc bronze powder, a white magnesite ground replaced the yellow ochre, and imported synthetic ultramarine and emerald green supplanted traditional materials, until by about 1920 at Choedrak’s Thukje Lhakhang aniline “coal tar” dyes were used extensively and the coherence of the material system had been abandoned ¹⁷.

Other accounts of the pigment and finishing system describe colours applied as a series of coats of a lime-and-gum emulsion on a moist wall, polished with a smooth surface such as a conch-shell, using cochineal for red, lapis lazuli for blue, arsenic for yellow, and arsenic mixed with lapis lazuli for greens ³⁷; and a palette in which altar-room plaster used argar mud as a base and organic colorants predominated—indigo, lac-based browns and vermilion brown, and a range of black, green, red, and mauve shades shared with textile dyeing—reflecting a logic of local material availability over imported mineral pigments ¹⁹. Rammed-earth walls more simply received a lime-paint finish ³⁴. The natural colours of earth, stone, and weathered wood in private buildings, set against the white, gold, and vivid polychrome of sacred and official structures, are described as a socially accepted chromatic hierarchy; the entablature, originally composed of stacked firewood, has become formalised as a wide painted band ²⁴.

3.2.8 Allied crafts: paper, clay sculpture, and wood carving

The same material logic extends to allied crafts. Paper is manufactured from the inner bark of the Daphne and Edgeworthia shrubs, reduced to pulp and cooked with ashes; two methods produce the widely used resho ('cotton paper') and the uniquely Bhutanese tsasho ('bamboo paper'), the latter formed on a slim-bamboo screen and dried by adhering the sheets to the earthen walls of a purpose-built hut. Bhutanese paper resists insect damage, though the ink—soot, herbs, yak-blood, and animal glue—remains vulnerable ³⁸. Clay was used for gigantic sculptural figures, a practice possibly originating at Khotan where stone was unavailable; such figures were painted and gilded to imitate metal and their gilded patina renewed annually, until, with growing wealth, the gilding of clay was replaced by thin beaten-metal shells ³⁷. Wood carving formed an important school, with sandalwood statues imported from India and craftsmen reportedly drawn from Cooch-Bihar, the raw material found in abundant variety in Bhutanese forests ³⁷.

3.2.9 Regional differentiation of materials

The choice of primary wall material is strongly regional. All dzongs, lordly residences, and important temples are built of stone, while village houses vary by location: rammed earth (adobe, cob, pisé) is the commonest material in western Bhutan, stone in the centre and east, and woven bamboo matting—often on houses raised on stilts—in the east ²¹²⁷²⁶. The same west–earth / centre-and-east–stone division is repeated in other surveys, with the wall thickness of western compacted earth given as 80 to 100 cm ³³³². At the extremes of elevation the palette changes again: thatched bamboo in the southern foothills, and stone structures and yak-hair tents at the highest elevations ³². The upper storeys of all building types, however, share a consistent timber-frame system infilled with bamboo lathing and whitewashed render, producing a legible constructional hierarchy of stone or earth base, timber frame, bamboo infill, and shingle roof ²⁶²⁷.

3.2.10 Material change in the modern period

The traditional palette has been substantially altered by modern materials. Corrugated sheet metal has widely replaced wooden shingles because of their short lifespan ³³³², and the substitution of timber shingles with galvanised iron and cement-asbestos has caused waterproofing failures and accelerated timber decay ⁹. Cement has latterly been adopted in place of traditional mud mortar in foundations ³⁴. The introduction of concrete construction, often painted in “Bhutanese style,” is described as a material rupture that surface ornament cannot mask, accompanied by a fashion for large glazed bays and verandas poorly adapted to the climate ²⁶. In conservation practice, by contrast, concrete has sometimes been confined to non-visible utilitarian uses—capping a former kitchen to create a buried storage chamber—while repairs and reconstruction proceed in traditional load-bearing stone and timber in earth mortar, demonstrating the continued viability of the traditional system; in one case earth recovered from demolished kitchen walls was reused as mortar in new stone masonry ¹¹.

3.3 Structural systems

The Bhutanese structural system combines heavy load-bearing walls of earth or stone with a timber frame assembled almost entirely by joinery rather than metal fasteners. This pairing—mass for stability, timber for spanning and ornament—recurs from the smallest dwelling to the largest fortress, and is most fully elaborated in the dzong. The system’s deep origins, comparative position, and seismic behaviour are treated in 3.3.10 and Section 3.4 respectively.

3.3.1 Load-bearing walls: mass, slope, and taper

The fundamental structural principle is the massive, load-bearing wall of stone, earth, or mud-brick, built into a heavy rectangular structure: straight, solid, vertical walls, usually in conjunction with wooden columns, support the horizontal wooden beams of the flat roof or upper storey, producing a box-like room that may be repeated upwards or sideways ³⁰²⁹. In the farmhouse the entire weight is carried by these walls of beaten earth resting on stone foundations, which taper slightly as they rise ³⁰.

Two features distinguish the wall: its inward slope and its upward taper. Walls of stone and clay are built with a greater inward slope than European practice, contributing to structural stability, and the roof projection is described as extremely well proportioned to the extraordinary thickness and slope of the walls ²⁰. White records the sloping outer face as “very characteristic” of Bhutanese architecture, and Sir George Birdwood identifies it as a deliberate strategy giving stability and visual presence to buildings on steep terrain—structural, not merely decorative, and consistent across fortifications, monasteries, and elite residences ⁸. The walls are made heavy at the base and decrease in thickness as they rise, while windows and balconies increase in size on each higher floor, the combination of plain wall below and ornamented openings above achieving a counterpoint of mass and lightness ²⁴⁵. The Choedrak walls taper from 1.7 m at ground floor to 1.1 m at the third floor ¹². In the dzong, the taper is applied only to the exterior face, the inner side remaining perpendicular to the foundation base, so that inward-slanting balconies and windows are achieved by external tapering while interior woodwork faces stay perpendicular ³⁹.

3.3.2 Nailless timber framing and joinery

The timber frame is assembled without metal. Beams are joined by mortise and tenon, boards by pieces let in across and dovetailed, with no nail, bit of iron, or even a wooden pin appearing, yet the work shows no deficiency of strength or security ²⁰. This principle holds across building types: both dzongs and houses are built without nails or metal hinges, the constructional logic resting on joinery, interlocking timber frames, and load-bearing masonry ⁴⁰. Doors are pivoted on wooden pegs fitted into round holes above and below the frame, planks assembled by tongue-and-groove ³³²², and timber split by wedges and fashioned without metal ³¹. The absence of nails allows some movement and settlement without catastrophic failure ³³. Traditionally all wooden elements were joined by tenon and mortise, though nails have come into use over roughly the past thirty to fifty years ²⁷²¹²⁶.

3.3.3 Columns, beams, and the post-and-beam system

Where walls alone cannot span an interior, a post-and-beam system carries the load. The upper floor is supported by wooden beams seated in holes in the mud or stone wall, with central columns providing intermediate support where a single timber cannot span the full width ³²³³²³. Sources differ in how they characterise the relative roles of wall and frame: some treat the thick earthen walls as the primary load-bearing element ³²³¹³⁰, while others describe the compacted-earth walls of the west as functioning chiefly as infill and thermal mass, with the timber frame carrying the structural load ³³. At Dechenphug the interior repeats an identical frame at each of four levels—two timber columns supporting a central transverse beam from which floor joists span to the perimeter walls—creating a flexible cage that allows non-structural subdivision without compromising the load path ¹¹.

In monastic buildings and dzongs the column-and-beam system is described as purely Tibetan in its standardisation, though developed from columns used in Tibetan farmhouses. The columns taper slightly upwards, are commonly square in section with slightly fluted faces, and have near the upper end a constriction or “neck” traceable to Achaemenid Persian architecture, often ornamented with Indian hanging-garland or vase-and-foliage motifs; the column then swells out and is recessed to hold the capital. Unlike the square Greek and Roman capital, the Tibetan capital is elongated along the beam it supports in a common west and central Asiatic manner, carried to such extremes that the capital of one column sometimes touches the next, its outer face carved in a swirling cloud-like outline ²⁹³⁰. Davis earlier noted the veranda pillars as uniform and painted, swelling too much toward the bottom, with capitals like two long brackets joined together ¹⁶.

3.3.4 Roof structures

The pitched roof above a flat floor is the tradition’s principal structural innovation, departing from the flat Central Tibetan roof in response to rain and snow while contributing an impression of lightness ²⁷²¹²⁶. Beams are mortised into the wall heads and carry purlins and rafters supporting the shingle covering ²⁶; the beams are assembled by joinery and the shingles held in place by heavy stones ²¹. The characteristic system uses four trusses of heavy timbers resting on the flat top of the main body of the house, held together solely by the ingenious slotting of their vertical and horizontal members into one another, with further rods running from one truss to the next to prevent sideways movement; the pitched roof is added as an afterthought over a complete flat roof, the space so created forming an open loft for stacking firewood and fodder ²⁹³⁰²⁶. This slotting together of horizontal and vertical timbers is common in Chinese roofs of all ages, though in China proper a complex bracketing system usually supports such a roof; the first to develop these roofs may have been early non-Chinese groups in what is now southern and western China ³⁰²⁹.

Two further roof features are recorded. The roof is detached from the wall head by short posts, so that the broadly overhanging, low-pitched roof appears to float and functions as a separate structural element—producing the “clear space between the roof and the wall tops” that Harrison notes beneath the pine-rafter, pine-shingle roofs of the dzongs ¹¹²⁸. And the roof space may carry a second gable, jamthog (or jamthong), raised over the main gable to improve ventilation; in the Ura stone house the gable sides are almost fully closed by the outer gable wall, while in the Eutsa rammed-earth house the elevated gable covers only half the lower roof ²³.

3.3.5 The rabsel and the cantilevered upper storey

A distinct structural subsystem is the rabsel, a wooden façade framework that cantilevers beyond the primary wall, supported by internal timber structure and enlarging the floor plate of the upper storeys; it functions simultaneously as structural element, thermal buffer, and ornamental façade, and is prefabricated, disassembled, and reassembled on site ²³. The cantilever projection of the timber-framed front section over the lower walls is a deliberate strategy allowing the upper living quarters to extend beyond the footprint of the load-bearing walls below ³². The elaboration of projecting timber oriels (rabsal) to the proportion of entire façades is read as a key factor in politico-cultural differentiation ⁴. Conservation work at Buli Monastery illustrates the subsystem’s vulnerability: the rabsel was anchored by timber joists that had sagged and tilted, threatening collapse; it was relieved by jacking the joists from inside and lowered using pulleys fixed to the roof-truss tie beams, and the ground-floor ornamental columns (Kachens) had been reinforced some forty years earlier by a stone wall built to anchor the failing rabsel above ¹³.

3.3.6 Vertical organisation of the domestic plan

The Bhutanese house organises its functions vertically. In central and inner Bhutan houses are typically two to three storeys, with the ground floor reserved for livestock, the first floor for living quarters and a chapel, and the top floor or attic for firewood, meat-drying, and grain storage—an arrangement reflecting both functional necessity and the constraints of steep terrain ²². Ura describes the three-storey house in detail: the ground floor housed livestock (pigs and calves kept at night for safety and warmth), the second floor held grain storage, equine and cattle accessories, and sleeping rooms for serfs, and the third storey accommodated the household family’s shrine room, living room, balcony, kitchen, toilet, and bedrooms. Access skirted the livestock pens via steep ladders—carved from large logs and often pitched at 80 degrees—rising to an open balcony (sathe) or, in smaller houses, a small parapeted verandah (jayda). The attic (tekha, yatekha, or khopsang) was high and airy, stocked with fodder, straw, and resinous pine for lighting, and served also to house symbolic palaces for supernatural spirits (gyalpo) and to provide offerings to nocturnal predators (semong) that controlled vermin. In the two-storey houses of subtropical areas, livestock were penned outdoors, the ground floor held the granary, and the second floor accommodated humans and gods, the floor area running 600 to 900 square feet excluding the attic ²⁵. Internal stairs are steep and fitted with handrails (kaseragyu), and floors employ broad wooden planks, documented at Eutsa up to 40 cm wide ²³. Ladders, cut from a split fir tree with rude holes for steps, were preferred because they take up less room where level ground is scarce ⁶²⁰.

3.3.7 The dzong: tower, courts, foundations, and defence

The dzong concentrates the tradition’s structural logic at monumental scale. Davis described the palace of Tassisudon (Tashichö Dzong) as a quadrangular stone building, its front a third longer than the sides, with lofty walls upwards of thirty feet sloped from foundation to top; above the middle ran a row of projecting balconies with black hair curtains, while below the walls were pierced with very small windows for air rather than light. A central tower five or six stories high was appropriated to the supreme Lama; the palace held near 3,000 men and was divided into courts flanked with galleries supported on wooden pillars, with two entrances—one of wooden steps edged with iron within the wall thickness, the other a grand flight of stone steps ⁶. The castle of Chuka was a large square building on elevated ground with a single entrance, walls of stone and prodigious thickness, and three separate buildings enclosing a quadrangle court of ample strength for defence ⁶.

The structural core is the central tower (utse). Jest describes it as housing the main chapels, reached above a basement by steps to a vestibule and square hall giving onto a two-storey chapel with two lateral shrines, the tower set in a courtyard surrounded by a two-storey enclosure of monks' quarters and classrooms, with a basement corridor and rooms used for defence as arsenal and stores, the walls decreasing in thickness from bottom to top ⁵. Dujardin records a dzong as an oblong of roughly 180 by 72 metres developed along a north–south axis, with a six-storey utse and multiple courtyards—a civil first courtyard (doshen), a dark corridor to the second courtyard giving access to the tower, and a third courtyard reaching the major temples and the monks' great assembly hall (kunre)—entered by a steep flight of steps to a fortified porch (gorikha) bearing huge prayer wheels (dungkhor) and the Four Guardian Kings ⁴. White describes the dzong as based on the square or rectangular tower as primary load-bearing element flanked by lower court buildings: at Poonakha the main citadel measured about 40 feet at the base and 80 feet high, with a second smaller citadel in a later court, the parallelogram divided into courts whose perimeter walls and timber-framed buildings distribute loads through a cellular system, allowing the dzong to function as a self-contained, defensible unit ³.

Ura gives the foundation and stability logic. Foundation stones are laid on a substratum of smaller stones (contrary to the assumption that large stones form the base), with the foundation-level thickness calculated to carry the full height to the eaves—at Punakha Utse, twelve feet at the foundation tapering to four feet at the fifth level—and high retention walls continue to rise without forming rooms, strengthening the foundation and producing the lift-off effect that makes a dzong appear airborne ³⁹. The non-monolithic construction of the dzong as an ensemble of separate buildings set at different foundation levels confers structural advantage, allowing individual sections to be built or repaired without addressing the whole, on the same principle as a segmented retaining wall in which damage is confined to a segment ³⁹ (its seismic implications are taken up in 3.4.4).

Defence was integral to the structural fabric. Running under the eaves was sometimes a chemin de ronde, an unobstructed corridor for defenders, with arrow and gun loops; in times of danger, roofs were taken off the towers and stone-throwing catapults stored beneath the eaves reassembled, and some towers had cantilevered fighting platforms with mud-brick parapets. Outer defences survive at Paro, where Ringpung dzong is surrounded on three sides by a loopholed wall reinforced with square towers (dzongchungs) often placed at the corners, while at Jakaryugel dzong the entrance is protected by a forework serving as a barbican ²⁸. Water supply was secured by loopholed covered ways and river towers (see 3.1.4) ²⁸.

3.3.8 Bridges

River crossing demanded specialised structures, since piers were almost excluded by the unequal heights and extreme rapidity of the rivers ⁶. The timber bridge at Wangdu Phodrang exemplifies the cantilever solution: a tripartite arrangement of two outer spans and a raised central span avoids any pier in the riverbed, the members inserted into rock at the banks with the centre cantilevering above the water; three gateways (one on each bank and a third on a midstream pier pointed like a wedge toward the current but convex behind, so the divided water deposits sand that supports vegetation) integrate fortification with the crossing, and the structure is fastened entirely by wooden pegs without metal ⁷. The iron-chain suspension bridge at Chuka carried a matted bamboo platform laid loosely on five chains so as to play with the swing of the bridge, and swung underfoot as one trod upon it ⁶.

Thangtong Gyalpo’s iron-chain bridges employed two principal types. Type 1 hung a bridge rail and walking layer from two parallel chains by ropes (sometimes with bamboo mats), enhanced by additional chains at walking-layer height; type 2, a stress-ribbon bridge, used several chains side by side to carry the screed and rail directly, with higher chains as railings; a mixed variant combined a Himalayan wooden cantilever with spanned chains above and below ³⁶. The Chung Riwoche Chakzam, spanning about 60 m in its wide opening and 35 m in the shorter, used four chains—two thicker links carrying the walking layer, two at handrail height connected to the lower chains by ropes—on stream and land pillars of wackestone reinforced with wood rising about six metres, the stream pillar incorporating a 15-metre breakwater and icebreaker upstream; the Phuntsholing Chakzam placed two river pillars and two bridgeheads at 20 to 25 metres' distance, its central field spanning about 76 metres on two chains supplemented by ropes; and the Tholing Chakzam combined a wooden cantilever anchored in rock with two iron chains hung above to address the inadequacy of the cantilever alone over a wide span ³⁶. Cantilever bridge technology recurs consistently across dzongs as the standard river crossing ³⁴, and the same masonry-and-cantilever skill carried large wooden channels of water across rivers to irrigate rice fields on the opposite bank ³.

3.3.9 Structural analysis, failure modes, and conservation findings

Modern structural assessment treats the rammed-earth building as three components—foundation, walls, and floor-roof systems—the foundation a strip footing of random rubble masonry, the wall relying on its monolithic mass to resist vertical loads and provide lateral stability, the timber floor of joists on bearers spanning between walls or intermediate posts, and the roof of timber trusses simply supported on the attic floor. Finite-element modelling with eight-noded solid elements shows that the zones around openings are highly vulnerable in all load cases, that stress concentrates where floor and wall meet, that stress decreases with greater wall thickness and increases with wall height and with the number of putlog holes, so that minimum wall thickness must vary with height and load ³⁴.

Conservation surveys document the system’s characteristic failures. Jest reports that hardly a single wall in the religious buildings has not moved at some time, that the oversized timbers were often set “green” and warp and look unstable, that spans are occasionally excessive, and that the main defects follow from roofing in bad condition causing wet rot in the timbers; he recommends connecting the inner structure to the walls by bolting steel anchors to beam ends set in a concrete padstone, and notes that inner structures are generally well built while roofing is often of low standard, with spaced purlins and badly made hipped and tiered roofs ¹⁴. At Tamshing the walls were in good condition but the roofing and wooden elements were severely damaged by woodworm and water infiltration, with rising damp through capillary action where external ground stood higher than the interior floor ¹⁰. At Dechenphug a penetrometer acquired by UNESCO was used to detect decay in timbers sound to visual inspection, confirming the good general condition of the structural timber and limiting repairs to secondary flooring and roofing; an earlier settlement of the central posts, caused by inadequate foundations beneath the central columns, had cracked the timber-framed cloison supporting a mural but was found stabilised and not in need of reconstruction, and the new service building was rebuilt on identical structural principles ¹¹.

3.3.10 Origins and comparative position

The wall-and-beam system is traced to techniques originating west of Tibet, in areas historically occupied by speakers of Iranian languages, though the techniques themselves go back to remotest antiquity and appear to have been developed in the Middle East ³⁰²⁹. The system differs fundamentally from Chinese buildings, which employ jointed wooden frames incorporating pitched roofs, and from the farm buildings of the Indo-Gangetic plain ²⁹. Several elements nonetheless show eastern and southern affinities: the slotted roof joinery and the wood-framed upper walls may owe something to Chinese carpentry ³⁰²⁹, the column “neck” derives from Achaemenid Persia and the capital from a west and central Asiatic type ²⁹³⁰, and the trefoil-topped windows must ultimately derive from India, presumably via Tibet, being well known in Nepal and parts of India ³⁰.

3.4 Seismic behaviour and traditional resilience

Bhutan’s position in a major seismic belt makes earthquake performance a defining concern of the built heritage, and the sources reach differing—sometimes opposed—judgements about how resilient the traditional system actually is. Some treat rammed earth and the timber-frame-with-masonry system as inherently resilient; others document progressive, cumulative damage and conclude that the system is vulnerable. Both positions are presented here as they appear in the references. The doctrine of impermanence provided a cultural framework that accommodated, and even celebrated, the resulting cycle of damage and renewal ⁴.

3.4.1 The seismic context and the historical record of damage

Earthquakes are described as a constant structural threat, with the country lying in a major seismic belt and the largest recorded earthquake noted as that of 1714 ⁵³⁹. The documentary record of damage is extensive. Punakha Dzong suffered fires in 1798, 1802, 1831, and 1849 and severe damage in the 1897 earthquake, yet its configuration as recorded in 1783 and as viewed in 1904 and 1931 did not differ substantially—a continuity read as evidence of inherent resilience—before later calamities (a 1986 fire destroying the south-west corner and the head abbot’s winter quarters, and an enormous flash flood in October 1994 damaging the Dzongchung) accelerated reconstruction ⁴. At Simtokha dzong, limited landslides on the west and north sides and vertical cracks on the outer wall surfaces indicate seismic stress requiring investigation of the masonry’s internal condition ⁵.

The UNESCO survey catalogues specific events: the 1981 earthquake caused severe damage to the structure, walls, and timber of Tamchog Lhakhang (compounded by blasting during construction of the Paro–Chusom road); the 1987 earthquake damaged Tongsa dzong, especially the southern and oldest zimchung and chörten lhakhang portions; the 1990 earthquake severely damaged the entire structure of Risum Gompa; and Tashigang dzong, in a major earthquake zone, has been repeatedly damaged. Seismic stress was found to produce vertical cracks in pisé de terre walls, failure of timber connections, and roof displacement ¹⁴⁹. White’s earlier account of the 1897 earthquake records the complete destruction of the original tower at Tashi-cho-jong (rebuilt by about 1902), considerable damage to the frescoes at Poonakha with large strips of plaster shaken from the walls, and visible damage at Angdu-phodang with repairs slowly progressing ³. Detachment of the wall paintings at Tamshing has been attributed in part to mechanical stress and earthquake activity, compounded by the re-crystallisation of soluble salts carried by infiltrated water ¹⁰.

3.4.2 Performance of rammed earth

Rammed earth is reported to have demonstrated proven seismic resilience: houses built in this technique never toppled during earthquakes, the maximum damage being cracks in the wall surface, a behaviour captured in a Bhutanese saying that one earthquake caused a crack while a subsequent earthquake closed it. The monolithic character of the wall—created by progressive compaction in shuttering frames—allowed it to move and flex without catastrophic failure, and this resilience contrasted with stone construction, which proved more vulnerable, making rammed earth particularly suited to Bhutan’s seismic environment ³¹.

A more cautious assessment is given by the structural-defect survey, which finds that the defects of rammed-earth buildings—vertical cracks at building corners where walls are unrestrained, corner cracks from joist movement and improper shear-wall connection, horizontal cracks at each lift from poor ramming, lintel cracks over openings from shrinkage of drying timber, weakness at putlog holes, and delamination of inner from outer wall layers under weathering—indicate that traditional construction does not inherently provide resilience against unexpected structural demands; this source offers no explicit analysis of seismic mechanisms ³⁴.

3.4.3 Performance of stone and timber-frame systems

The traditional load-bearing system of stone walls in earth mortar with internal wooden frameworks is credited with inherent resilience through the flexibility of the earth-mortar joints and the capacity of wooden elements to absorb and dissipate energy ⁵. The timber frame is repeatedly described as providing lateral flexibility—able to move without immediate collapse—while the brittle infill walls crack and lose integrity; the 1981, 1987, and 1990 earthquakes at Tamchog Lhakhang, Tongsa dzong, and Risum Gompa caused cracking in walls, failure of timber members, and roof damage, and post-earthquake repairs often took the form of emergency supports (as at Rimochen) rather than systematic restoration, leading the survey to conclude that the system lacks inherent seismic resilience and that damage is progressive and cumulative ⁹. White similarly judged that the compartmentalised court structure and the flexibility of timber elements offered some resilience, but that the widespread damage across multiple dzongs showed the seismic performance was not fully adequate, and that the defective post-1897 rebuilding at Tashi-cho-jong—where main walls cracked and the interior subsided—suggested either compromised craft knowledge or repair methods that diverged from the original constructional logic ³.

3.4.4 Traditional seismic features

Several specific features are credited with seismic function. At the corners of rammed-earth walls the patsi embedded gagshing—long stones or hardwood laid parallel to the wall face—specifically to reinforce against fracture during earthquakes, a measure reported as effective ³¹³⁹. Master builders contend, on the grounds of oral tradition, that earthquake tremors rise and fall in a north–south wave direction and that the east–west orientation of the ceiling beams (which emerge outside as the cornice element bhog) provides substantial earthquake resistance, citing the dzongs' survival of major earthquakes including that of 1714 ³⁹. The non-monolithic construction of the dzong as an ensemble of separate buildings on different foundation levels is held to minimise overall damage through compartmentalisation, on the same principle as a segmented retaining wall, so that destabilising forces damage only a segment rather than the whole ³⁹. Against this body of attributed features, one survey explicitly records that it identified no specific traditional seismic-design features, documenting only the system’s vulnerability and the cumulative nature of the damage ⁹.

3.4.5 Modern interventions and repair

The references caution that modern interventions may either help or harm seismic performance. Rigid concrete repairs and the replacement of earth mortar with cement-based materials may compromise the flexibility on which the traditional system depended, even as the recognition that anti-earthquake reinforcements may be considered “wherever applicable” during major repairs reflects an attempt to enhance traditional performance through contemporary engineering ⁵. The recommended procedure is first to determine whether movement is still “alive,” using tell-tale cracks bridged with glass; where serious movement is found, openings are filled either with well-matched stonework or with a cast-in-situ reinforced-concrete bonder (maximum dimensions 100 × 25 × 25 cm), and roof-level failure is addressed with a stone ring beam bedded in cement mortar or, where walls are very unstable, a reinforced-concrete beam reinforced with thick-gauged mesh, the use of steel bars being avoided ¹⁴.

3.5 The building process and the master builder

Behind the materials and structures lies a distinctive way of producing buildings: a hierarchy of patron, ritual specialist, and master-builder; a design method that works through proportion, full-scale samples, and prefabrication rather than drawings; a labour system that was largely communal and ritually framed; and a craft transmitted by apprenticeship and traced to a divine ancestor. The same human system was responsible for the cycle of destruction and faithful reconstruction that preserved the tradition’s forms.

3.5.1 The conceptual trinity: patron, ritual master, and master-builder

The conceptualisation and materialisation of Buddhist ideas as built form is attributed to a trinity of actors—the patron, the ritual master, and the master-builder—the level of architectural “do-thinking” rising with the political and religious rank of the trinity, so that the highest patronage (king and head abbot) had the greatest impact on architecture throughout Bhutan ⁴. The most senior master-builder, the zorig-lapon (exceptionally zorig-chichop), is entrusted with interpreting whatever changes the highest patronage proposes, his role being to merge profound knowledge of Buddhist iconography—couched in the canon of his own anthropometric measurements—with the patron’s practical and spiritual objectives. This is a collaborative process that may produce unexpected, last-minute alterations: a site visit and brief discussion among patron, master-builder, and ritual master can suffice to alter, reverse, or reposition prefabricated and already installed components, and the master-builder guides not only carpenters (shingzow) and woodcarvers but all skilled craftsmen and the unskilled labour force ⁴.

3.5.2 The master-builder: titles, roles, and knowledge

Several specialised roles are recorded under different titles. The zowpon (master-builder and expert woodworker) was responsible for estimating the size, number, and volume of timber for an entire building and providing the owner with precise quantities; he treated internal and external façade woodwork as separate categories, controlled timber stock, identified and shipped timber from the forest, issued it daily to workshops, and marked measurements directly on the timber when allocating it ³⁹. The patsi was a master builder-engineer specialising in rammed earth, responsible for structural integrity: he possessed specialised knowledge of soil testing, compaction sequencing, and shuttering management, judging compaction by the acoustic signature of tamping and the tightness achieved when the wooden shuttering wedges (soti) were hammered, adjusting each new frame to taper a thread’s thickness above the last, and directing the placement of reinforcing gagshing at the corners; the role was traditionally imported from Lhasa, and a patsi’s arrival was ceremonially marked by about half an hour of verses sung by the assembled workers ³¹. The local master builder, the tsi tsow (rtsi bzo), discusses all architectural details—the location of doors, windows, and the rabsel—intensely with the client but prepares no formal plans for traditional farmhouses, only for government buildings ²³. Across the trades, the master craftsman executes the final and most delicate work while disciples prepare materials and perform preliminary tasks, with complex window and door elements assembled at ground level and then mounted on the walls ²⁶²⁷.

3.5.3 Design without drawings: proportion, samples, and prefabrication

The tradition does not design on paper before building ³⁴²³. Instead it relies on proportional schemes in which graphics and building plans play a secondary, didactic role, with oral instruction transmitted from mentor to disciple through extensive on-the-job training ⁴. To standardise measurement, the master-builder provides artisans with small sticks, typically bamboo, marked with the elementary units of his own canon, and prepares full-scale samples of the most important, innovative, and complex timber components; this system of “scaling”—using the anthropometric scale of the master-builder rather than the patron—ritually interrelates all craftsmen from the nation’s most senior master-builder to the lowest apprentice ⁴. The high standard of this prefabricated timber architecture allows carpenters to process, fabricate, and test virtually every component at ground level, each building disassemblable into numbered timber profiles, so that very high quality is achievable with only a few skilled experts and maximum use of unskilled labour ⁴. The structural-assessment survey records the same absence of paper planning—skilled craftsmen working from knowledge passed through practice, the rammed-earth building consisting of four sequential components (foundation, walls, timber floors, roofs)—but judges that this empirical, thumb-rule approach has produced defective practices and poor workmanship, the most prominent causes of instability being overlooked putlog holes, weak and improper formwork, and inadequate attention to detail, and concludes that proper design aids and guidelines are needed to improve upon the traditional master-builder approach ³⁴.

3.5.4 Ritual specialists and site preparation

Building involves ritual specialists alongside craftsmen. The astrologer (lopentsipa, slob dpon rtsipa) determines the exact location and orientation of the building, tests the ground by examining four soil samples from the cardinal directions, and—his primary task—pacifies and prevents the lu (earth spirits) and sabta (malevolent forces) occupying the soil from harming the inhabitants, defining the auspicious time to begin construction ²³. The client may choose among three standards for placating local spirits: the most expensive salang method (about 16,000 Ngultrum or 240 USD) draws a nine-field square with a sheep horn, places shells in the corners, and interconnects sixteen pegs on each side with woollen thread in horizontal, vertical, and diagonal patterns to ban both lu and sabta, the protective square being maintained for three days before foundation digging begins; cheaper alternatives fill a marked hole with milk and stones or offer uncooked rice and vegetables ²³. A lay monk (gomchen, sgom chen) may perform these rituals, and the lopentsipa also fixes the dates for four further ceremonies—consecration of the foundations, the main door, the rabsel, and the completed building—while the painting of the rabsel is executed by a lay monk from outside the village ²³.

3.5.5 Labour organisation: communal, gendered, and rhythmic

Building work was organised communally and divided by task and gender. In rammed-earth construction, teams of women and girls poured and rammed the earth to the rhythm of special songs while the men hewed and trimmed the timbers for floors, roof, and upper storeys ²⁹. Tamping sessions were known as pacham—literally “dancing on rammed earth”—and frequently extended past midnight, because each shuttering frame had to be finished before nightfall, leaving a frame half-completed overnight being prohibited on the explanation that ghosts would dance and tamp on incomplete work; roughly four bagfuls of soil were spread after each session, a complete frame requiring forty or more bags ³¹. Bringing fir shingles down from the forest required a mass of community labour to transfer them out in a single day ²⁵, and even daily water collection was constrained by the terrain and by the need to gather water before livestock contaminated the spring, a housewife making on average seven early-morning trips up steep wooden ladders ²⁵.

Until recently, buildings were constructed through extensive systems of communal obligation using virtually free labour and practically free materials, a system that gave the majority of families spacious, carefully built, handsomely decorated homes; the time-intensive carving and painting carried no commercial consideration because neighbours exchanged labour as needed, allowing the rich store of indigenous craftsmanship to be shared and preserved ²⁴. In the conservation era, when a monument requires repair the owner petitions the district authority (Dzongda) or the Special Commission for Cultural Affairs, which enquires, contacts the Ministry of Finance for funding and the Ministry for Home Affairs (which can authorise compulsory labour, gongdrak woola, of local villagers and skilled craftsmen), and appoints an engineer to prepare a budget, work plan, and material specification, the proposed working unit requiring master craftsmen in carpentry, stone masonry and foundation work, and painting, each with apprentices ⁵. Training for the master crafts is done in Thimphu, reputed craftsmen (masons, carpenters, joiners, carvers, painters) are treated as essential to conservation decisions, and the Monk Body organises district-level workshops ¹⁴. Large reconstruction projects mobilised labour under multiple master-builders supervising workers from specific regions—for example, in the Thed–Thim region (Thimphu, Punakha, Wangdi), teams guided daily by zowpon such as Kunza Dorji of Shaa, Talo Nepa of Punakha, Pau Taa of Shaa, Parop Naap Namgay of Paro, and Nim Tenzin of Tshochen—demonstrating coordinated mobilisation following ancient precedent ³⁹.

3.5.6 Compensation and ceremony

The master builder-engineer received distinctive compensation and treatment. The patsi was entitled at the start of construction to a gho (garment) of lower value, an axe, and a dagger, with payment made separately, and received throughout a special daily menu—creamier butter tea, protein-rich dishes, and stronger drink than ordinary workers. Principal carpenters directing house construction were customarily entitled at the consecration ceremony to a gho (usually a lungserm), an axe, and a sword, again with separate payment, and the householder, carpenters, masons, and patsi were all felicitated with gifts during the house consecration ³¹.

3.5.7 Transmission of knowledge, apprenticeship, and divine lineage

Craft knowledge passed by lineage and extended apprenticeship. All Bhutanese master-builders and craftsmen feel associated through lineage with Vishwakarma, the prime and heavenly architect venerated in both Hinduism and Buddhism, an association that gives ritual meaning to the transfer of culture from the king’s most senior master-builder down to the village carpenter ⁴. The exemplary case is Trulbi Zow Balingpa, the Zhabdrung’s most senior master-builder at the founding of Punakha Dzong in 1637, believed to be an incarnation of Vishwakarma: under the Zhabdrung’s guidance he is said to have visited in a dream the heavenly Palace of Guru Rinpoche (Zangdopelri) and materialised what he had seen as a scale model carved from radish, which the Zhabdrung then commanded to be executed in wood—later sources describing how Balingpa, though intelligent, at first could not grasp the design and required magical guidance to the paradise, and how from this foundation arose the expert woodworkers of Bhutan said to belong to his lineage ⁴.

Expertise was acquired by long apprenticeship and learning-by-doing. Zowchen Naku began as an apprentice (lagshey) at about age 26 during the reconstruction of Thimphu Tashi Chodzong around 1963–1964, working under various master builders; Zowpon Rinchen of Punakha Tsheykha began apprenticeship at age 18 on the wholesale timber replacement of Punakha dzong in 1981–1982 and subsequently worked on Dechencholing Palace, five temples in Phajoding, Haa Tachu Goempa, and the post-fire reconstruction of Paro Taktshang, building twenty-one rammed-earth houses over thirty years across Punakha, Paro, Haa, and Thimphu ³⁹. The strength of this transmission is shown by the practice of reconstructing buildings exactly as they were after destruction by fire, evidence both of the formal tradition’s strength and of the continuity of craft knowledge across generations ²⁷²⁶.

3.5.8 The master-builder as engineer: Thangtong Gyalpo

The figure of Thangtong Gyalpo extends the master-builder’s role to direct engineering and material production. For the Chung Riwoche Kumbum, the lord of La-stod Lho accepted his proposal to establish a Buddhist centre at the site of his iron-chain bridge across the Yarlung Tsangpo and supplied craftsmen, wood, and workers from his administrative territory (khri.skor) ³⁵. His biography records that the master and his disciples worked with earth and stones, and recounts his being completely buried by heavy stones while breaking stone for construction and emerging after three days “more robust than ever before”—a narrative conflating construction practice with hagiographic legend ³⁵³⁶. When the structure collapsed three times while being built up to the bumpa level, he reframed the failures as manifestations of impermanence and motivated discouraged workers by explaining that completion was essential to prevent natural disasters—storms, poverty, crop failure, excessive rain, strife, and disease—a rhetorical strategy linking the building to collective welfare; the work extended from 1449 to 1456, completed at age ninety-six, its complexity (nine stories with eighty-four chapels) requiring coordination across a dispersed labour force ³⁵.

The production of iron and steel proceeded through multiple craft stages under his direction or personal involvement—ore extraction and transport, continuous smelting over up to a month with knowledge of which woods yielded superior iron, and the forging and final welding of chain links at about 1,400 °C using arsenic as a flux to produce corrosion-resistant steel—and the construction of bridge abutments and pillars involved quarrying and shaping wackestone, reinforcing it with sophisticated timber frameworks, and positioning the structures to withstand floodwater, ice drift, and wave action (as in the Chung Riwoche stream pillar’s 15-metre breakwater and the precise pillar spacing of the Phuntsholing Chakzam) ³⁶. The consistency of chain-link dimensions and forging technique across identified bridges suggests a coherent workshop practice and transmission of craft knowledge, though the reuse of chains from dismantled bridges complicates precise attribution ³⁶.

3.5.9 Continuity and rupture in the modern period

The continuity of the building process has been disrupted in the modern period. The recent introduction of concrete construction, often painted in “Bhutanese style,” represents a material rupture that surface ornament cannot mask, and the contemporary fashion for large glazed bays and verandas—poorly adapted to the climate—signals a weakening of the coherence between form, material, and environmental logic that characterised the tradition ²⁶. The conservation literature accordingly envisages structured transmission as a remedy: special training for a small group of recently graduated Bhutanese architects and engineers who could use their professional influence to bring the virtues of conservation to wider attention, and the possible involvement of international master-craftsmen from European guilds or from Buddhist countries where the traditions remain alive, to transfer knowledge and develop solutions to contemporary problems ⁵¹⁴.

4 The Architectural Language

Having established how Bhutanese buildings are made, this section turns to how they are composed and what they mean. Its subject is the architectural language—the formal, proportional, and symbolic conventions through which a building of any type becomes legible and expressive—and its central claim is that form and meaning in Bhutan are inseparable: proportion, plan, elevation, and ornament together constitute a single system in which structural logic, cosmological order, and devotional content are mutually expressed. The section is organised as an ascent from governing principle to visible surface. It begins with the proportional canon repeatedly identified by observers as the discipline underlying an apparently diverse body of work, a canon derived not from abstract geometry but from the body of the master-builder (4.1). It then examines the second ordering system—cosmology and geomancy—through which religious doctrine determines the siting, orientation, and plan of a building, so that the act of building becomes a translation of cosmic order into physical form (4.2). From these principles it proceeds to their realisation in space, tracing the vertical zoning of the house and the court-centred organisation of monastery and dzong around the central tower (4.3); to the architectural elevation and the language of the façade, where sloping walls, fenestration, the rabsel, and the crowning roof are resolved into a counterpoint of mass and opening (4.4); and finally to ornament, colour, and image, argued throughout to be integral to structure rather than applied embellishment (4.5). The recurring question is how a tradition without drawn plans achieves coherence across every scale, and how it embeds meaning in the fabric itself.

4.1 The proportional canon

Observers of Bhutanese building have repeatedly identified proportion as the governing discipline beneath an apparently diverse body of work. In the survey by John Claude White and the accompanying commentary by Sir George Birdwood, proportion is named “the master-canon of all good architecture” and described as “everywhere in evidence” in Bhutanese and Himalayan building. Birdwood saw it “justified by the subtle harmonies of its results, as in the relation of the height to the length and breadth of the buildings; of the doors to the size and purpose of the buildings; and of the windows to the spaces between them.” White for his part judged that “the lines are in all cases excellent” and that “the sites chosen are unexceptionable, both from the point of view of defence in the forts and for habitation in the private dwellings.” Taken together, these observations describe a coherent design logic—the ratio of height to plan dimensions, the scale of openings relative to wall surface, the spacing of fenestration—that underlies the variety of building types. ⁸

This proportional discipline was not derived from abstract geometric ratios but from the body of the builder. At Punakha Dzong, the dzong’s spatial organization is structured around a system of proportional design in which the anthropometric measurements of the master-builder serve as the canon for all architectural relationships. Because this canon is based on the master-builder’s own measure rather than on drawn geometry, it ensures coherence across all scales of the building and allows design principles to be transmitted through oral instruction and on-the-job training rather than through drawn plans. ⁴

In its most characteristic expression, proportion is realized as a counterpoint between mass and opening. The most distinctive feature of Bhutanese architecture is the finely-proportioned relationship between elaborately carved and painted window details and plain, massive earthen walls. The tapering walls, pierced by increasingly larger openings on each higher floor, are said to recall the mountains that are never far from sight; the windows and balconies set against the heavy wall achieve an effect of lightness, balance, and proportion. The combination of plain wall with decorated openings that grow wider and more ornamental as they ascend toward the roof is described as extremely effective in producing both visual and spatial coherence. ²⁴ The way this proportional relationship is worked out in the vertical face of the building is treated further in section 4.4, and its decorative dimension in section 4.5.

4.2 Cosmology, geomancy, and the ordering of site and plan

Beneath the proportional canon lies a second ordering system, in which religious cosmology and geomantic practice determine where a building is placed, how it is oriented, and how its plan is composed. In this tradition the act of building is understood as a translation of cosmological order into physical form, so that siting, orientation, and ground plan are inseparable from ritual and social meaning. UNESCO conservation planning treats this explicitly, listing the “geomantic choice of a site” and “the ritual use of space” among the themes to be taught in regular lectures and courses on conservation, alongside history, iconography, symbolism of form and colour, building techniques, and the rituals of construction; it notes that the religious activities of dzongs, monasteries, and temples, together with the presence of farming communities, animate the historic sites and contribute to a unique ambiance, so that the spatial organization of buildings is inseparable from their ritual and social function. The same source records that Thangtong Gyalpo (1385–1464 A.D.), who built Tamchog Lhakhang, achieved particular distinction through his association with bridges and ferries and built a number of chortens on geomantic principles. ¹⁴

4.2.1 Cosmological schemes and the geomancy of the landscape

The largest-scale expression of this ordering is the mTha'-dul Yang-dul scheme, documented in the Ma-ni bka'-'bum and related sources, which orders the Tibetan landscape and its extension into Bhutan through the placement of temples upon the body of a supine demoness (srin-mo). The scheme adapts the Chinese Five Zones of Control (fu) from the Yu Kung, restructuring them on an east-west axis rather than the original north-south orientation. The four Ru-gnon temples form the central zone, corresponding to the demoness’s shoulders and hips, and represent the “Royal Domain Zone” and the basic units of military and economic administration. The four mTha'-dul temples—including Byams-pa'i lHa-khang and sKyer-chu in Bhutan—correspond to her elbows and knees and represent the “pacification zone,” the zone of allied barbarians. The four Yang-dul temples occupy the soles and palms, representing the outermost zone of cultureless savagery. The whole structure resembles a mandala, with cosmological significances that may reflect Buddhist influence from the eighth century onward. The celestial animals of the four quarters—the “Four Protectors” (srung-bzhi) of Chinese geomantic tradition—are correlated with the four seasons, four elements, and four directions, though the Tibetan alignment of these symbols differs substantially from the Chinese prototype. From an interpretation of these allied symbols of Chinese origin came the geomantic principle that a building is best sited with the land “open” (phye) to the east, “heaped” (spungs) to the south, “straight” (drang) to the west, and “curtain-like” (yol) to the north. ¹

At the scale of a single foundation, the example of Punakha Dzong shows how these principles select and shape a site. The spirit of place (genius loci) of the dzong is drawn from geomantic and metaphoric considerations as well as from legends and foundation myths. From the viewpoint of oriental geomancy the dzong could not have been better positioned: it is embraced by two merging rivers that are attributed human feminine (mo) and masculine (pho) characteristics. The founding legends speak of the Jilligang Hill as a “reclining elephant,” a theriomorphic reading that reflects the prevalence of pre-Buddhist traditions of geomantic divination and animism, in which the most prominent spatial features of a place are thought to take the form of a deified human or animal. The “taming” and founding of the setting is ascribed to Guru Rinpoche in the eighth century, and the founding myth of the first building on the site, the Dzongchung (”little fortress”), references his prophecy. The spatial environment is structured to comply with Buddhist ideas about life and after-life, making the act of building itself a deed of virtue; sited at the confluence of the two rivers, the building emerges “like a ship” at the foot of the Jilligang Hill. ⁴

4.2.2 Ritual siting and the consecration of the ground

Geomantic principle is realized through ritual procedures carried out before construction. The astrologer (lopentsipa) determines the location and orientation of a house by examining soil samples taken from the four cardinal directions and by pacifying the lu and sabta—earth and malevolent spirits—through ritual, so that spiritual protection is established before building begins. A protective square called the salang, drawn with nine fields and interconnected pegs, creates a cosmologically ordered ground plane that must be maintained for three days before foundation work starts. In the surveyed houses, however, orientation toward the valley floor (east in both documented examples) rather than toward a cardinal direction suggests a practical cosmological logic that prioritizes solar gain and the relationship to the landscape over abstract directional rules, with the rabsel façade element consistently facing this valley orientation. ²³

The relation of building and cosmos extends beyond the building envelope into the domestic landscape and the act of construction itself. Earth spirit shrines (lu) are placed in gardens and maintained with offerings of rice, fruit, buckwheat, and milk on the fifteenth day of the first Buddhist month, indicating a cosmological ordering of the ground around the house. ²³ A young tree—of fir, spruce, or juniper, chosen according to the deity of a mountain and its associated conifer forest—was hoisted onto the roof of a house each autumn in a ritual by which the chief householder bid the deity Lha Ode Gungyel to descend on the house in a timely manner, bringing longevity, fertility, potency for human beings, and richness of cattle herds; the deity was believed to descend from the sky onto the banner or tree, which was pulled directly up to the rooftop over the walls to avoid contamination. The attic, in turn, contained a symbolic palace for the gyalpo, a class of spirit that came to live in particular houses because of certain events; families made food offerings at every meal to the gyalpo resident in their attic, each of which had a specific identity and name. Both practices embed cosmological belief directly into the physical structure and use of the house. ²⁵

4.2.3 The cosmos rendered visible: plan and painted diagram

The cosmological order is also made visible within the building, both in the form of the plan and in painted diagrams on its walls. Davis records the Rajah’s account of the cosmological system as a universe whose celestial regions sit on the summit of a square rock of immense magnitude and height, its sides composed of crystal, ruby, sapphire, and emerald; about halfway down lies the region of the sun and moon, placed on opposite sides of the rock and constantly revolving around it; beneath is the ocean surrounding the whole, with seven stripes of dry land encompassing the foot of the rock together with some islands, the residence of mankind, the Rajah identifying the island comprehending Boutan, Bengal, and others as situated on the south or sapphire side, with the infernal regions under the earth. This schema is rendered visible in wall paintings within the dzong and establishes the proportional and directional logic by which the building embodies the universe. The square plan of Tashichö Dzong—an oblong two hundred yards in front and a hundred in depth, divided within into two squares by a separate building raised in the centre—may be read as a three-dimensional translation of this cosmological diagram, with the central structure more lofty and more ornamented than the rest, housing the Rajah and principal people and crowned with a square gilded turret said to be the habitation of one of the lamas. ¹⁶

The cosmological diagram appears repeatedly as wall painting in the dzongs, where its proportional fidelity to textual sources varies from building to building. At Punakha Dzong, the entrance veranda to the main assembly hall carries an abhidharma cosmos mural showing an immense circle of blue clouds outside the Cakravāla mountains, representing the disc of wind on which the physical cosmos forms; whereas Wheel of Time paintings regularly show the elemental substrata of wind and fire, abhidharma murals rarely depict this circle of wind, though examples exist at Trongsa Dzong and Samye, where, as at Punakha, the circle of wind is portrayed much larger than the other features of the cosmos, reflecting the measurements in the Treasury of Abhidharma. At Simtokha Dzong, proportional measurement achieves its most precise expression, the geography of the cosmos being depicted to scale as described in textual sources: Meru appears in elevation while the rest of the cosmos is rendered in a measured plan, as shown by the linear decrease in the sizes of the golden mountain ranges, with the continents rendered minuscule in proportion and an interlocking network of circles and arcs outside the rings of golden mountains representing astral paths—an arrangement that illustrates how most other Cakravāla imagery departs from textual sources in its proportional relationships. Bhutanese artists also depict the Wheel of Time cosmos alongside the abhidharma cosmos in separate murals; at Punakha a Wheel of Time painting occurs alongside the abhidharma cosmos and a wheel of existence, and although the two cosmologies are somewhat conflated, circular Meru is visible at the centre, surrounded by circular rings of mountains and oceans (thin red, yellow, white, and blue stripes) and the twelve continents in a plain blue circle representing the sea of Greater Jambudvipa, beyond which a larger wave-filled ocean represents the disc of water, surrounded in turn by the discs of fire (red) and wind (green). ⁴¹

4.2.4 The plan as a concentric and processional cosmological order

In the monumental architecture of the dzong, the cosmological order is expressed in the very arrangement of the plan, which integrates military, governmental, and religious functions within a unified spatial whole. The central towering building (utse) houses the main chapels and stands at the axial centre of a courtyard, surrounded by a two-storey enclosure containing monks' quarters and administrative offices. Large courtyards occupy two sides of the utse, with narrow passages at the two other ends, and the whole dzong is entered from one end only, creating a processional and hierarchical sequence. The main temple block is surrounded by a continuous wall of outer buildings—administrative offices, law courts, store rooms, arsenals—which present an unbroken wall to the outside and access the courtyards within. The plan thus sets the sacred centre (the utse with its chapels) within a secular and defensive periphery in a concentric organization that reflects cosmological hierarchy: the basement level, used for defence and storage, grounds the sacred and administrative functions in the earth, while the ascending storeys of the utse reach toward the heavens, so that religious, administrative, and defensive functions occupy their proper places within a unified whole. ⁵

4.2.5 Sacred site, sequence, and the iconographic program

At the scale of the individual temple, cosmological order takes the form of a sacred sequence that moves from the public exterior to an innermost sanctum, often generated by a pre-existing holy site. At Choedrak, the sacred cave within the cliff is understood as the spiritual foundation of the whole complex: the cliff is held to display multiple manifestations of Guru Rinpoche, visible to highly revered masters such as Dilgo Khentse Rinpoche, Dodrup Rinpoche, Polo Khen Rinpoche, and Drupwang Penor Rinpoche, who have identified eight such manifestations, and the cliff appears, according to one’s spiritual perspective, like a pile of scriptures from one viewpoint and a stupa from another, with prominent natural features including a white couch and a track along which Dakinis are believed to have danced. The built lhakhang is organized to culminate in the Goenkhang, the restricted shrine within the cave itself, so that the spatial hierarchy—from the public ground floor through progressively more sacred altar rooms to the innermost cave shrine—translates cosmological understanding into architectural sequence, the cave being not a backdrop but the organizing principle of the entire structure. That the monastery was built around the twelfth century by disciples of Gyalwa Lorepa, following his residence at the sacred site, shows that the spiritual significance of the place preceded and motivated the architectural intervention. Interior decoration reinforces this ordering: the Guru lhakhang and Lama lhakhang are adorned with colourful representations of deities, saints, and lamas, while in the Goenkhang black predominates, marking a shift in chromatic and spiritual register as one approaches the most restricted and powerful space. ¹²

A comparable integration of plan and painted program appears at Tamshing Lhakhang, whose cosmological spatial organization is centred on the Guru Khang (the cella containing the main divinity) and the Geongkhang, around which circumambulatory corridors run on both the ground and upper floors. The two-storeyed structure includes a large rectangular space—the Tshokhang, commonly known as Kunrena—in front of the Guru Khang, where monks perform ceremonies; it opens to the ceiling over the upper floor and forms a running gallery on four sides of the first floor. The iconographic program reinforces this order. Reading clockwise from the west wall are the elements of the protecting deities, the wheel of life, and the protecting deities themselves; the north wall depicts a sequence including Peling, Karmapa VII, Mache Khando Yeshi Tshogyel, Lopen Pema Jungney, and others, divided by a chevron element in the corner. The circumambulatory corridor around the Guru Khang shows, on its outer wall, eight of the sixteen Arahts on the north side, eight Mein Lha Dea Shei Gye on the east side, and the remaining eight Arahts on the south side, while its inner wall shows the Zhoshing of the School of Pema Lingpa. On exiting the corridor, the east wall shows the three Buddhas of present, past, and future (Di Sum Sangay), the south wall the Gondi Lhatshog, the Phurpa, Chenrizee, and Jampa Yang, and the west wall again the protecting deities and the representation of their elements. The upper-floor corridor contains paintings of more recent execution, with the Thousand Buddha on the north, west, and south walls, while around the Geongkhang the outer wall illustrates the Tshepa May and the inner wall scenes from the Pema Kathang. The spatial and iconographic program thus translates Buddhist cosmology into plan and painted decoration as an integrated whole. ¹⁰

4.3 Spatial organization in plan and section

Where sections 4.1 and 4.2 describe the principles that order a Bhutanese building, this section describes how those principles are realized in the arrangement of space, both in plan and in vertical section. Across building types the same underlying logic recurs: a vertical stratification of function, a court-centred grouping of accommodation around a sacred or administrative core, and an adaptation of both to the slope and features of the site.

4.3.1 The vernacular house: vertical zoning by function

The typical farmhouse is organized vertically into three functional zones. The ground floor, accessed by a ladder cut from a single piece of wood leading to a platform of bamboo rods laid on the ground-floor ceiling joists projecting from the wall, houses cattle and other livestock in a walled yard. A doorway from this platform gives onto the first floor above, a set of windowless rooms used for storing grain, beer, and other produce, reached by another ladder through a trapdoor. The upper storey comprises the living quarters proper, which are surprisingly spacious, with ample room for a married couple and their many children as well as guests. The main living-room is furnished with a hearth for cooking, a few carpets and low cupboards, and domestic utensils hanging from the walls; a small guest room adjoins it, separated by a framework of pillars that help support the main roof beam, and through this same framework one can look across to the chapel on the other side. ^29,30

This vertical arrangement, in which people live above their animals, is identified as one of the four characteristics that stamp a house as Tibetan in the wider sense. The flat roof, covered by an extra pitched roof, is used for storage and as an extension of the living space—here for stacking firewood and fodder in an open-sided and open-ended loft. ³⁰

Later surveys confirm the same three-tier organization while adding considerable local detail. Ground floors, historically used for animal stables, are entered through the main door on the valley-facing side, with internal staircases leading up to the floors where living and ritual spaces are concentrated; the upper floor carrying the rabsel functions as the primary living area, the space directly behind the rabsel window being divided off by light wooden walls for storage and shrine use. In the Ura stone house the ground floor contained separate stables for cows (norso sang), calves (yoso sang), and sheep (yoso sang), with the winter kitchen (guensa) placed on the first floor above the stables to benefit from their warmth; the second floor holds the main kitchen (taptsang) with both an old clay stove (thab) and a modern steel stove (me rtsa), a sacred room (choesham) for rituals, and storage rooms (parang, rum, nangmai), the rabsel here serving as an entrance hall (rabsel, rab gsal) with a large wooden box for buckwheat storage. In the Eutsa rammed earth house the ground floor was used for stables and agricultural storage (phomna) with internal stairs leading up; the first floor (bakhi), under renovation in 2014, formerly held a kitchen (tapsang) with a traditional stove; and the second floor contains the primary kitchen and living room (taptsang) with a modern steel stove, storage rooms (phomna, bayana), a sacred room (choesham), and the prominent rabsel space (yapna) oriented toward the valley, at the time of survey used for clothes storage. Both houses keep a sacred room (choesham) on the upper floor, equipped with altars (choettrue) and ritual objects, showing the integration of religious practice into the domestic spatial hierarchy. ²³

A broadly consistent picture is given for rural houses generally. They are rectangular, with one or two storeys, the upper floors built almost universally as an open wooden framework with bamboo lathing filling the spaces and covered by white plaster; the roof space between the flat roof and the two-sided sloping roof is used for drying vegetables or meat and for storing hay, and in towns is closed off with bamboo mats. In farmhouses the ground floor is dimly lit by narrow windows and used for farm animals and as a storeroom, the upper floors being reached by a ladder with steps hollowed out from a tree trunk; a middle floor, where present, can be used for storage or to provide rooms for servants and visiting relatives; and the top floor, lit by many windows, is where the family lives, divided into small rooms that have no specialized use except for the latrines, the kitchen, and the little private chapel (choesham), which doubles as a bedroom for guests and lamas. The house gives onto a courtyard, sometimes covered, forming a terrace where all sorts of daily activities take place. In towns the houses are laid out similarly, but the ground floor has windows and contains the kitchen, the storeroom, and the servants' rooms, and can also be turned into a small shop. ²¹

4.3.2 The monastery and the dzong: courtyard organization around the utse

Monastic and fortress architecture extends the vertical logic of the house into a court-centred plan organized around a dominant central block. At Talo monastery a tall temple-block forms one side of a square courtyard whose other three sides are cloistered and serve as accommodation for monks. The whole building faces southeast, the main entrances of both the courtyard and the temple-block facing that way; the courtyard entrance is a pillared porch approached by a flight of steps, though entry is normally gained through small doorways where the cloisters meet the temple-block, leaving room for the circumambulation-way around it, which is marked by a continuous row of prayer wheels set into the temple wall. The three sides of the courtyard not occupied by the temple-block are of two-storey construction, with a pillared arcade behind which lie living quarters and an upper storey faced with wooden frame and panelling. The temple itself, raised on a kind of semi-basement storey and entered by a further flight of steps, consists of three main floors, each divided into three rooms—a large central room with two smaller flanking chambers; on the ground floor the central space is an entrance hall with staircases and the side rooms are used for storage, while the rooms on the upper floors are all chapels, the largest and principal one at the top in the centre. Because the building stands on a gentle slope and the courtyard is level, there is room for a basement storey around the three lower sides of the courtyard, accessible only from outside and housing cattle and other livestock; the analogy with the ordinary farmhouse is immediate, since from the pitched roof at the top sheltering the “master of the house” on the top storey down to the cowsheds in the bottom storey the arrangement is practically identical. ^29,30

In larger dzongs the central temple-block is completely surrounded by a rectangle of buildings presenting a continuous wall to the outside; the courtyard around the central block may sit at different levels on each side of the main temple, the entrance courtyard being used solely for offices and storerooms, with monastic quarters set around two further courtyards beyond the temple and in a large building at the far end. ²⁹ More generally the dzong is organized around a central tower (utse) set within a courtyard whose surrounding walls carry the cells of monks, kitchens, and administrative offices; the configuration is legible and hierarchical, the utse forming the sacred and administrative centre, the court the organizing void, and the perimeter buildings the functional accommodation. More complex dzongs—such as Punakha, Wangduephodrang, and Thimphu—employ two courts divided by the central tower, one surrounded by administrative buildings and the other by monastic structures, creating a spatial separation of secular and religious functions within a single fortified envelope; the most intricate, Trongsa, develops the principle through multiple courts, buildings, and passages at varying levels following the topography of its mountain site. This range of types shows how one consistent spatial principle—the court-centred organization—accommodates functional complexity and site-specific adaptation without abandoning formal coherence. ²⁶

The functional division and the circumambulation requirement are constant features of the type. The dzong was built to a common plan with local variations, each example remaining architecturally unique, and was typically divided into two functional areas: one for civil and secular administration and the protecting garrison, the other to accommodate the substantial monk body with their teachers and lamas, the two zones usually separated by a central tower or utse. The utse is the most important building within the dzong—invariably square or oblong and multistoreyed, containing the main temples, frequently the abbot’s residence, and the gonkhang, the home and inner sanctum of the protective deities—and it also served as a defensive tower. The buildings for both spiritual and temporal needs were arranged around a stone-flagged courtyard, the dochen, on three of its sides; although functionally distinct, these buildings showed no architectural difference. Built against the outer dzong walls were two or three tiers of rooms with verandas or arcades facing inward, and below them storerooms for cereals—notably barley and buckwheat—together with butter and dried or cured meat, foodstuffs provided by the dependent neighbouring lay population as a form of tax to safeguard against famine, natural disasters, or civil strife. The utse was invariably separated from the courtyards by a pathway required for pious clockwise circumambulation. ²⁸

At Punakha the court-centred plan is composed along an axis tied to the river and the surrounding terrain: the building complex develops along its north-south axis, the entrance of the dzong facing the entrance gate of the little fortress (Dzongchung), and its orientation appears to look upstream of the mother river, avoiding direct confrontation with the Jilligang Hill. The spatial configuration comprises multiple courtyards arranged in sequence—the first courtyard (doshen) accommodates the civil wing, a dark corridor leads to the second courtyard, and the third courtyard gives access to the ecclesiastical wing—a hierarchical arrangement that reflects the functional and spiritual organization of the institution. ⁴

4.3.3 Organization shaped by site and topography

The same court-and-tower logic is repeatedly reshaped by the slope and features of the ground, sometimes to the point where topography becomes the generator of the plan. At the Dechenphug monastery the spatial logic of sacred architecture is expressed at intimate scale: the ensemble comprises three buildings arranged around a small court, with the utse tower as the dominant vertical accent. The composition is governed by the sloping terrain, the three buildings being set at progressively higher elevations with their rooflines stepping upward in response to the slope, creating a subtle spatial hierarchy that guides movement and sight-lines. The tower, modest in footprint (10 m square) but rising 16.60 m to the wall head, dominates through vertical emphasis rather than mass; the Guru lhakhang, lower and to the side, is visually subordinate yet architecturally complete; and the service building, originally a small timber structure on four posts, occupied the remaining corner. The court itself is small and intimate, its scale determined by the surrounding buildings rather than by any independent geometric rule, with the sacred rock—the incarnation site of the Genyen Jagpa Melen—at its centre before the tower entrance, establishing a ritual focus. The spatial sequence is carefully composed: entry through the perimeter wall opens onto the court; circumambulation of the sacred rock precedes ascent of the tower; and the tower interior repeats the hierarchical organization, with a ground floor holding a prayer wheel and stair, a first floor with the assembly hall (lobur), a second floor with the principal sanctuary (gongkhang) dedicated to protective deities, and a third floor with the Buddha sanctuary (Sangay lhakhang). The proportions are restrained and harmonious, the buildings being described as “modest in scale, intimate in character, harmonious in proportion,” their rooflines set at increasing heights so as to “accompany the slope of the terrain with supple ease.” This spatial organization was the critical issue in a conservation dispute: a proposal by the local authorities to reconstruct the Guru lhakhang at a higher elevation would have raised its roof to the same height as the tower, destroying the carefully calibrated spatial hierarchy and the subtle integration of buildings across the slope. The compromise solution preserved this logic by relocating the new service building southward by its full width, enlarging the court moderately without disrupting the composition, and completing the perimeter wall to permit circumambulation of the tower while maintaining the original spatial relationships. ¹¹

At Choedrak the topography and a pre-existing sacred cave together dictate the section of the building. The lhakhang measures 15.65 metres by 5.92 metres in plan, a proportional relationship that establishes the elongated rectangular form characteristic of the Bhutanese temple type, its longer side facing south both for passive solar heating and for visual command over the Chumey valley below. The three-floor organization, arranged in stepping fashion, is dictated by the steep site topography and, critically, by the location of the sacred cave within the rocky cliff: the cave, measuring approximately 4 metres by 4.4 metres, sits one metre above the third-floor level and functions as the Goenkhang, the restricted shrine dedicated to the protector deities. The built structure ascends to meet and frame the natural cave, so that the cave becomes the spiritual and spatial generator of the entire complex, and the number of floors is determined by the imperative to connect the constructed lhakhang to the pre-existing sacred site. The ground floor is a narrow hallway no wider than 2.42 metres, recently converted to accommodate a caretaker’s cabin at its far end, the space in front of the gedkar windows having become a place of seclusion where devotees can spend moments in contemplation overlooking the valley; the first floor is dedicated to the Guru lhakhang (6.1 metres by 7.9 metres) and the second floor to the Lama lhakhang (6.9 metres by 7.9 metres), these altar rooms being named after the major statues they house, following Bhutanese convention. The entrance to the upper floors is reached from an exterior raised platform 2.2 metres in height, accessed by a flight of wooden stairs from the foyer of the first floor—an external circulation strategy that reflects the site constraints and the need to preserve the interior volumes for religious function. ¹²

4.4 The architectural elevation and the language of the façade

Read as a vertical face, the Bhutanese building presents a consistent and legible language in which structure, climate, and meaning are expressed at once. Across the building stock—from dzong to farmhouse—the same formal devices recur: inward-sloping walls, windows that grow larger and more elaborate as they rise, deeply projecting roofs, and ornament concentrated toward the top. Their consistency creates a legible architectural language in which material, structure, and ornament are integrated into a coherent visual expression. ²⁶

4.4.1 Sloping walls, fenestration, and the soaring effect

The defining feature of the elevation is the inward-sloping, tapering wall. Walls of stone and clay are built with a greater slope inwards than European buildings, and this constructional logic shapes the visual profile of the elevation. ¹⁶ The same inward lean (talus) is followed in whitewashed walls across building types, after Tibetan convention. ²⁶ The taper is what allows the dzong to reach considerable height—five storeys for the central tower and four to five for the surrounding buildings—while keeping visual and structural coherence. ³⁹ Cumulatively, these features give Bhutanese buildings the characteristic, shared with Tibetan building, of seeming to float or soar despite their extreme solidity; Punakha Dzong in particular is said to look like a huge ship riding at anchor in the valley. This soaring effect is attributed partly to the subtle inward taper of the walls as they rise, combined with the concentration of ornament toward the top and the jutting roofs, the huge white expanses of wall being set off by the narrow band of red, the brilliantly painted woodwork of the windows, and the glitter of gold ornaments. ^29,30

Fenestration follows a clear vertical hierarchy. Windows increase in size with each storey: the lowest openings are in effect arrow loops or ventilation holes for storerooms, and the highest storey carries projecting wooden balconies. ²⁸ Several practical reasons are given for the small outward-facing windows: they are easier to replace at intervals of about seventy-five years when the timber requires renewal, they retain warmth in winter rooms, and they are kept particularly small near ground level to prevent intrusion, while at higher storeys, where the risk of intrusion diminishes, they become larger; since the higher the storey the lower the load the walls must carry, the windows can displace wall area as one ascends, and the width of walls adjacent to the upper-floor balconies decreases both to accommodate spacious grand windows and to reduce structural load through wall displacement. ³⁹ The enlargement of windows in the upper storeys of fortresses follows Tibetan precedent but is adapted to the Bhutanese climate and to the need for light in the upper residential floors. ²⁷ The elevation is thus organized around a systematic relationship between massive earthen walls and increasingly elaborate window and balcony treatments at higher levels: the walls are plain and logically structured, rising with decreasing thickness and increasing openness, while the windows and balconies become progressively wider and more ornamental toward the roof, creating a visual hierarchy that moves from the solid base to the decorated upper storeys. ²⁴

In the eighteenth-century account of Tashichö Dzong, this language is already fully present. The building presents three storeys of apartments communicating by handsome verandas continued round the inside of the whole structure, with a passage from the middle storey to the Rajah’s apartments in the centre; from the windows of the upper chambers balconies project of a size to hold fifteen or twenty persons, and there are no windows below, as they would not contribute to the strength of the place. The roof has little slope and projects considerably beyond the walls, its proportional relationship to the extraordinary thickness and slope of the walls being judged extremely well proportioned, and the large projecting balconies are noted as much better adapted than windows to fabrics of so great an area and height. The only feature that strikes at first sight is the use of ladders instead of stairs between storeys—though the steps are broad and after use not found inconvenient—while at one of the two gateways a large and well-formed flight of stone steps provides a more formal ascent; the apartments themselves are spacious and as well proportioned as any in Europe. ¹⁶ The same emphasis on projecting balconies in place of windows, the absence of windows in the lower storeys, and the well-proportioned projection of the roof relative to the thickness and slope of the walls is recorded in the parallel account. ²⁰

4.4.2 Timber framing, windows, and the rabsel

The upper storeys are the realm of timber. In the farmhouse the upper storeys are faced with wooden frame and panelling: the outer walls of the guest room and much of the main living room are made not of rammed earth but of a framework of wood, jutting slightly outwards and filled in with thin wooden panels broken in places by narrow window-lights with trefoil-shaped tops, which can be closed off with sliding wooden shutters on the inside. ^29,30 These trefoil-shaped windows, occurring in groups of two or three, must ultimately be borrowed from India, presumably by way of Tibet, since they are well known in Nepal and parts of India. ²⁹ The same trilobate upper traverse of the window, together with complex symbolic lintels executed in timber, forms the primary ornamental expression of the façade. ²⁶ The windows are characterized by trilobed crossbars at the top and by complicated lintels that carry symbolic meaning in all of their parts, with lintels and windows painted in floral or geometric designs. ²⁷

On the house, the south-facing elevation is the primary architectural face: the ground floor presents a simple opening for a door and perhaps some windows cut into the compacted earth wall, while the upper floor is articulated as an elaborate timber structure with large divided windows that dominate the façade. This fenestration serves both practical and symbolic functions, allowing inhabitants to look outward while permitting smoke to escape above their heads through openings above the window head. The windows comprise a cut-out of a curved trefoil motif called a horzhing, a design element attributed either to Persian influence or to a practical aerodynamic logic, and the wooden frames and surrounding timber are frequently decorated with carved patterns and painted designs. An elaborate wooden cornice typically runs along the top of the wall directly beneath the roof, marking the transition between wall and roof plane. ³³

The dominant timber element of the façade is the rabsel, a wooden structure that projects beyond the primary wall and contains windows, panels, and ornamental detail, facing consistently toward the valley and so establishing a directional hierarchy in the building’s visual presentation independent of the cardinal directions. In the Ura stone house the rabsel is a prefabricated wooden framework reassembled on site, the spaces between its timbers filled with woven split bamboo (zag pa) and covered with mud plaster (dam kar ti mixed with cow dung), its painting executed by a specialized lay monk (gomchen) from outside the village—an indication that façade ornamentation requires trained craft knowledge. In the Eutsa rammed earth house the rabsel is of the gochham thognyim (sgo 'cham thog gyim) type, extending around the corner over the north-west façade, its windows separated by filled bamboo-mat panels (shamig or ekra) covered with mud plaster; a smaller rabsel window element on the second floor of the upward-slope-facing wall is embedded into the rammed earth rather than projecting, and the lower-floor windows are simpler, smaller, and embedded in the wall, designated geykar windows. The rabsel cantilevers beyond its supporting wall, enlarging the upper-floor space and creating a structural overhang that protects the rain-sensitive earth walls and wooden elements below; this functional overhang is at the same time an ornamental and status-bearing element, the jamthong roof type having historically been reserved for high social rank. The outer walls of the Eutsa house show signs of former whitewash, a finished surface treatment now largely abandoned. ²³

The name and structure of the rabsel are recorded in detail at Buli Monastery, where the Rabsel is the primary decorative and functional element of the southern façade. The Buli Rabsel is of the Parop type, consisting of three tiers of windows separated by two horizontal timber members, creating a layered, rhythmic composition on the exterior; the term derives from “Rab” (good) and “Sel” (clarity), expressing its functional purpose of providing light and clarity into the building through multiple window openings. At the time of conservation the decorative windows were tilted and on the verge of collapse, so that the façade had lost its structural integrity and visual coherence; detailed inspection showed that the structural members had failed through decay while the ornamental parts remained intact, allowing the failed timber to be selectively replaced while the original decorative elements were preserved, and the restored Rabsel—documented in its completed state during the Buli Mani festival in March 2005—reinstated the façade’s original formal and functional expression. ¹³

In the temple-block the upper windows take the form of triple-bayed balconies. At Talo the main windows of the temple-block look to the front and the two sides, constructed as triple-bayed balconies, each one slightly wider than the one immediately below. ^29,30

4.4.3 The roof and its crowning elements

The roof, perhaps the most striking feature when viewed from afar, consists of four trusses of heavy timbers supporting layers of thin wooden strips weighted down with rows of stones, the whole space so roofed forming an open-sided and open-ended loft. ³⁰ The roofline, with its perched shingles and the void space between the ceiling and the pitched exterior, creates a distinctive silhouette. ²⁶ The roof is pitched and originally covered with wooden shingles, making a strong silhouette against the sky, and prayer flags called goendhar are erected at the centre of the roof of all Buddhist homes, serving as a visual and spiritual marker of the building’s religious function. ³³ The floating-like roof, crowned at Choedrak with a bronze sertog turret, completes the composition; the roof form, while visually distinctive, emerges from the structural logic of the tapering walls and the need to shed water from a steep site. ¹² On the dzong the soaring, sloping walls are heightened still further by pagodas of two or more japhibs—typically three tiers of broach roof—terminating in pinnacle tops on the roofs of various buildings within the complex. ³⁹

A small turret or third roof is added at the very top, in the middle, of the major temple-blocks; this turret is common in southern Tibet and may well derive from the tiered roofs of early Indian temples. Because Bhutanese temples already possess height, it has not been necessary to emphasize them by piling up a tower of extra roofs as in Nepal, where the main image of a temple is placed on the ground floor of the building. ^29,30 The roofs are ornamented with the usual Tibetan “victory banners” in the form of hanging cylinders of metal suspended from a central pole, and the white expanses of wall are set off by the painted woodwork of the windows and the glitter of gold ornaments; the metalwork of these roof ornaments is treated as part of the decorative system in section 4.5. ^29,30

4.4.4 The red band and the contrast of stony exterior and ornate interior

A horizontal band of red painted near the top of the wall terminates the elevation of religious buildings. The main areas of the outer walls are whitewashed, leaving a horizontal band of red towards the top; this band is never found on ordinary farmhouses, although some people do whitewash their houses, and on monastic buildings the motif is elaborated in various ways. ^29,30 A broad red band marks the upper portion of the walls in temples and religious buildings, distinguishing them from secular structures. ²⁶ The upper part of temple walls is distinguished by a red band painted across the surface, with an ornament of gilded copper on the roof, and these elements function as markers of building type and religious function. ²⁷ At Choedrak the whitewashed tapering stone masonry wall, marked by the red khemar stripe across its upper half, establishes the visual identity of the structure. The full origin and decorative meaning of this red band is discussed in section 4.5.2.

The painted band that formalizes the entablature provides a visual terminus to the composition; the most important sacred and ceremonial buildings, temples, and palaces are frequently whitewashed, accented with richly elaborated polychromed woodwork, and climaxed with gilded finials and other decorations, producing a combination of contrast and harmony with the village houses, whose earthen walls and untreated wooden members weather to a rich dark brown. ²⁴ The façade thus operates as a threshold. The exterior of the dzong presents what may be called a stony face to the world—a fortified, austere public presentation—which contrasts sharply with the interior, where wooden balconies and galleries are faced with richly coloured, painted wood; the single, large, ornate door frequently serves as the primary architectural feature of the façade, emphasizing entrance as a moment of architectural significance and spatial transition, and the inward-sloping, tapering walls create a distinctive silhouette influenced by an Asian tradition extending from Tibet to Japan. ⁴⁰

4.4.5 Ornamental enrichment and external form

The ornamental enrichment of the elevation is concentrated at structurally significant points. White’s photographs record a consistent formal language of sloped outer walls, deep roof projections with visible timber brackets and ornamental detail, regularly spaced windows with inward-sloping sides, and painted or carved enrichment concentrated at lintels, cornices, and eaves; he notes the “bold designs” of ornamental carving in Nepali architecture, which “give much richness to the architecture,” and observes that Bhutanese buildings, while showing “Chinese influence,” display “a bolder design which has come from China through Tibet.” The elevation thus communicates both structural logic and aesthetic intention: the deep roof projection announces the building’s response to climate, the sloped walls establish stability and visual presence, the fenestration pattern articulates the interior organization, and the ornamental detail emphasizes the primary lines of the structure. ⁸ The farmhouse makes its striking visual impression through these proportioned masses, the large well-proportioned masses being enlivened by the white-painted panels of the upper storey and the brightly painted window frames and mouldings. ³⁰

The eighteenth-century account also records the ornamental programme of the elevation and its sources. Painted ornaments on pillars and walls are chiefly flowers and dragons in the Chinese taste, with bells suspended from the corners of the roof as in China; the pillars supporting the verandas are of wood, uniform and painted, their form—swelling towards the bottom with capitals like two long brackets joined together—representing a distinctive local aesthetic, though to the European eye of the observer the swelling form would “not please an eye accustomed to better architecture.” The architectural language thus incorporates Chinese ornamental conventions within a structural system of distinctive Himalayan character. ^16,20

4.4.6 External form and its evolution

The outward form of the dzong responds directly to its ground. The external appearances are typically Tibetan in character; when built on the crest or spur of a hill, the physical characteristics of the land are followed to take advantage of any natural defensive features, while on flat ground dzongs are square or rectangular—though that at Gasa has a rounded front. ²⁸ At Choedrak the constraints of place produce a unique formal solution within the typological repertoire: the east elevation is the primary façade to the courtyard and the approach pathway, almost two-thirds of the northern façade is blended into the rocky cliff, and the southern façade facing the Chumey valley is the principal elevation, its longer dimension oriented to capture solar gain and command the landscape view. The fenestration is sparse and strategically placed—a single window serves both the Guru lhakhang and the Lama lhakhang on the upper floors, while the ground floor has gedkar windows framing views of the valley—reflecting both the site constraints and the reliance of the interior on abundant wall surface for sacred painting. Notably, the temple lacks the hand-driven prayer wheels on the outer walls and the circumambulatory footpath that would otherwise define the characteristic outer feature of Bhutanese temple architecture, an absence attributed to the restriction of the site, where the cliff face and narrow courtyard preclude such conventional elements. ¹²

The façade is also a record of historical change. The morpho-typological evolution of Punakha Dzong from 1783 to 1999 reveals a significant transformation in the architectural expression of the façade. The configuration as depicted by Davis in 1783—following the dzong’s reconstruction in 1750 after a fire and the extensive elaborations patronized between 1744 and 1763—shows a relatively simple arrangement dominated by a single vertical element, the central tower (utse), with the timber oriels (rabsal) then amounting to no more than a grouping of individual larger windows or small individual loggias. Over the following two centuries, despite four fires (1798, 1802, 1831, and 1849) and damage from the 1897 earthquake, the configuration remained relatively stable through the early twentieth century. From the late 1980s onward, however, the dzong underwent a more drastic process of demolition and renewal, the final stages of reconstruction presenting a very complex architectural synthesis that blurs the commanding position of the single central tower in favour of a more ambiguous and differentiated complexity of clustered and juxtaposed individual buildings densely organized within the existing external walls. This evolution marks a move from a horizontally outlined structure dominated by one vertical element to a more complex arrangement in which individual buildings seem to want to emphasize their political or religious importance and status, the elaboration of the projecting timber oriels to the proportion of entire façades forming a key factor in this process of politico-cultural differentiation and explication. ⁴

4.5 Ornament, colour, and image as integral architecture

A recurring observation across the sources is that ornament, colour, and image in Bhutanese architecture are not applied embellishment but integral to the structural and spatial logic of the building. Ornament emphasizes rather than obscures the constructional logic; colour distinguishes building type and religious function; and painted image embeds cosmological and devotional content into the architectural fabric itself.

4.5.1 Ornament as integral to structure

The principle is stated plainly: ornament is integral to the structural and spatial system rather than applied decoration. The elaborately carved and painted window details are finely proportioned in relation to the plain, massive earth walls, achieving a counterpoint that produces lightness, balance, and proportion, and the windows and balconies become wider and more ornamental as they ascend toward the roof in a progression that is at once functional and aesthetic. ²⁴ The red band on temple walls, the gilded copper ornaments on roofs, and the painted designs on lintels and windows all form part of the architectural language through which building type and religious function are communicated; the same continuity extends into the decorative arts, the bindings of religious books being made from two wooden boards whose upper cover is often carved with divinities in high relief or covered with embossed sheets of copper. ²⁷

The integration of ornament with structure is clearest where carved and painted detail is concentrated at structurally significant locations—roof brackets, lintels, cornices—so that ornament emphasizes rather than obscures the building’s constructional logic. In Nepal, buildings are “profusely ornamented with excellent wood-carving, in very bold designs, which give much richness to the architecture,” while in Bhutan ornamental work appears in carved timber elements, painted detail, and the ornamentation of functional objects such as “daggers and swords,” where “the ornamentation...could not easily be surpassed.” Bhutan “turns out much excellent work in silver and gold,” and “a speciality in Bhutan are the applique and embroidered silk banners, which show great ingenuity of design, and are veritable works of art”; though portable, such objects extend the ornamental language of the architecture into the interior and ceremonial spaces. Birdwood’s commentary emphasizes the symbolic and cosmological dimension of ornamental imagery—the “star and crescent” on shields, the “Winged Sun” motif—while maintaining that ornament serves the architectural whole: “the ornamentation was restricted to giving emphasis to the leading lineaments of construction, and the breadth of treatment in the general distribution of the decorative details, thus securing great spaciousness and reposefulness of effect.” ⁸

This integration is realized concretely in the carved and painted programmes of columns and capitals. The columns and beams of monastic buildings carry ornamental programmes integral to their structural function: the columns taper slightly upwards, are commonly square in section with slightly fluted faces, and have near the upper end a constriction or “neck” that can be traced to Achaemenid Persian architecture; this neck is often ornamented with Indian hanging garland or vase-and-foliage motifs carved or painted on the surface, after which the column swells out once more and is recessed to hold the capital, whose outer faces are carved in a swirling cloud-like outline often tied into a design painted or carved on the flat faces. ^29,30 The pillars and capitals supporting the upper storeys are intricately carved and beautifully painted, with varying shades of red predominating. ²⁸

4.5.2 The red band and roof ornament

The horizontal red band, one of the most conspicuous markers of a religious building, is the elaboration of a once-functional feature. In Tibet proper the flat roof of the farmhouse is not topped by an extra pitched roof and is used for sitting, working, and threshing corn, and it proves convenient to stack brushwood and other fuel around the edge of the roof to form a parapet; this parapet becomes a semi-permanent or permanent feature, retained for its decorative effect and its usefulness in preventing people from falling off the roof, its outer face neatly trimmed and often painted black to contrast with the whitewashed walls beneath, while the joists of the top-storey ceiling are allowed to jut out a little and support the ends of the brushwood by means of a strip of wood laid across them, with a layer of clay sometimes plastered over the top to keep off the rain. The whole feature becomes fossilised as a purely decorative motif and, on monastic buildings, is elaborated in various ways: a further set of false joist-ends may be added immediately below the clay capping; the joist-ends may be made double, with round-section and square-section joists alternating; and the whole feature may be repeated vertically two or three times, with one of the levels painted red. The brushwood is often merely a thin layer let into a solid wall, and the lines of joist-ends need not correspond with the actual ceiling levels inside the building. In Bhutan the motif has been simplified to the point of merely painting a red band on the wall to represent the brushwood and letting into the wall a thin strip of wood carved to imitate the joist-ends—a simplification understandable given that the model for the motif, the layer of brushwood, is absent from Bhutanese farmhouses. ^29,30 This broad band, painted red madder below the roof level and known as the Khemar, serves both a functional and a symbolic purpose, denoting that the building serves a religious function while contrasting with the light grey, clay-coloured walls. ²⁸

The roofs are ornamented with the usual Tibetan “victory banners” in the form of hanging cylinders of metal suspended from a central pole. ^29,30 Together with the red band and the gilded finials, these elements compose the chromatic and metallic enrichment of the upper part of the building: from the inside of monastic buildings the eye is caught by the brilliant colours painted on all the woodwork in vivid combinations, contrasting with the whitewashed walls and stone-paved courtyards, while from outside the huge white expanses of wall are set off by the narrow band of red, the brilliantly painted woodwork of the windows, and the glitter of gold ornaments. ^29,30

4.5.3 Painted surfaces, symbolic motifs, and protective imagery

Painted and carved decoration extends across the full range of building types and serves both religious and secular purposes. The inside walls of dzongs and monasteries, together with the great doors, are richly decorated with paintings and slate engravings, and frescoes depicting protective deities are a standard feature of interior decoration, so that religious imagery is embedded within the architectural fabric itself; the interior walls of dzongs are faced with richly coloured, painted wood on the balconies and galleries, establishing colour and painted surface as essential architectural elements rather than superficial additions. In the vernacular tradition, nonreligious designs and representations are carved and painted on the front of many traditional houses. ⁴⁰ The interiors of dzongs are described as incredibly beautiful, carvings, wall hangings, paintings, and statuary decorating most of the rooms, while woodblock books, musical instruments, and Buddhist religious images are everywhere. ²⁸

On the house, the painted programme is integral to spiritual and protective function. Wooden surfaces throughout the house are painted with designs of specific symbolic significance—swastikas, floral patterns representing the lotus, cloud whirls, and the Tashi Tagye (eight auspicious symbols) being the most common motifs—while beside the front door larger paintings often depict mythical animals such as the garuda, or large red phalluses. The phallus, contrary to fertility symbolism, is associated with the Lama Drukpa Kunley and functions as a protective device against evil, and many houses are further decorated with carved wooden phalluses, often crossed by a sword, hung at the four corners of the roof or over the door for the same protective purpose. The systematic application of these auspicious symbols across the timber surfaces transforms the building into a cosmologically ordered object, so that the painted decoration is not merely aesthetic but integral to the house’s spiritual and protective function. ³³

A monumental instance of ornamental and architectural elaboration is the Prabhavali, or gate of honour, surrounding major Buddhist divinities. The Prabhavali of Avalokiteshvara at Simtokha monastery displays a marvellous elaboration that surpasses every other decoration hitherto seen in the Himalaya: of vast size, with the shifting forms and rhythm of leaves, flowers, and twigs in which even birds are interwoven in a fantastic mass of complicated designs, it constitutes a marvel of patient and painstaking work, its concept much like the tympanum of gilded copper doorways seen in seventeenth-century Nepal. The principal object of devotion is placed within an arch formed by the divinity’s several hands, then again surrounded by a large circular decorative border; on the top is the ever-present figure of Garuda in human form, with wings and cymbals held in two hands; two stylised peacocks on similar stands replace the stone Kalasha (flower vase) placed over a round, three-tiered pedestal seen in Nepal; and two Taras replace the goddesses Shri and Lakshmi, with supple limbs and elegant figures greatly resembling their Nepalese counterparts. The artists, who could not disobey the set commands of iconography in constructing the main figure of the deity to prescribed proportions, seem to have concentrated on these marginal motifs to display their capacity for decoration and skill in handicrafts. The colour of the divine image, like its structure, was laid down by rite and convention: in older paintings there is a uniformity in which few colours—reds, blues, and greens—predominate in soft shades, applied with hardly any shading, so that a figure emerges not from light and shade but as a kind of pattern outlined to form shapes, as though it were another version of the Mandala in which the psycho-physical world and divine powers are brought within the limits of circles, squares, and triangles. ³⁷

At Talo, the main temple is occupied by images of most of the Shapdrungs, ranged round the back and side walls, with the first, Ngawang Namgyel, in the centre. ³⁰

4.5.4 Wall painting, colour, and pigment theory

Colour itself functions as an integral component of architectural meaning rather than as applied decoration. A systematic, defined palette—comprising plant-derived indigo, lac-based browns and reds, and mineral blacks and greens—creates visual coherence across interior surfaces, and the testing of artist palettes reveals the deliberate composition of colour mixtures, indicating that tonal variation and chromatic harmony were matters of technical control and aesthetic intention. Applied to wall surfaces in fresco technique on prepared plaster grounds, these colours integrate pigment, surface, and structure into a unified whole, the mural paintings of chapels, assembly halls, and ritual spaces using the palette to articulate cosmological and devotional content. The three earliest extant wall paintings in Bhutan—at Taktshang, Khoma Lhakhang, and Tamshing—demonstrate the integration of colour, figural imagery, and architectural surface as a coherent system, and the material basis of colour, derived from plant and animal sources processed through dyeing and pigment preparation, connects pictorial practice to the broader material culture of the built environment. ¹⁹ Colour also operates within an architectural hierarchy of status: the natural colours of earth, stone, and weathered wood in private buildings are combined with the white, gold, and vivid polychrome treatment of important official and religious structures, a distinction that comprises a socially accepted hierarchy in which the sacred and noble are expressed against the background of the vast mountains while the common and ordinary relate to their source, the sustaining earth. ²⁴

The development of painted schemes over five centuries shows a consistent logic in which pigment choice, material technique, and visual effect compose a unified whole expressing the building’s sacred purpose. The earliest surviving scheme, at Tamzhing Lhakhang (completed 1505), demonstrates this integration through restraint: its flat, hieratic style and austere palette—muted indigo-based pale blue, ochres, and sombre dark grey, with brilliant pigments such as cinnabar, orpiment, and azurite used sparingly—recall contemporary thangkas from central and southern Tibet, the palette being not economically constrained but aesthetically deliberate, with no gold present in the original scheme, a significant absence that shapes the entire chromatic effect. By the seventeenth century the relationship between ornament and architectural meaning had become more elaborate: at Simtokha Dzong (1629–1631) the style is elegant and refined, betraying strong stylistic influences from Ming China, particularly in the spatial disposition of figure groups and the representation of landscape, and the palette is rich and vibrant, with lavish effects enhanced by elaborate detailing in gold, while colour modulation through selective organic coatings—thin, translucent applications over gilded and painted passages—creates visual depth and the delicate modelling of facial features. At Tango Monastery’s Gyalsey Zimchung (1689) the technical and chromatic sophistication reaches its highest expression: gold is used lavishly and treated in numerous ways—flesh passages gilded then coated with an organic glaze presumably originally tinted red; other gilded areas carefully burnished for contrast; delicate designs applied with powdered gold mixed with binder; and gold leaf applied onto thick, dark, resinous mordant over raised work and selectively coated with red and blue organic colorants—while yellow organic colorants shade the leaves of the tree beneath Tandin’s lotus throne and organic red detailing adds vibrancy to the fruits and birds nestling in its branches. The deterioration of these chromatic systems presents a critical conservation challenge: organic glazes and coatings, originally translucent and precisely tinted, often darken or lose translucency over time, appearing pale orange-pink instead of the intended light purplish-red, or becoming milky and semi-opaque, which renders them vulnerable to misinterpretation and removal during cleaning, so that the loss or degradation of these subtle layers fundamentally alters the visual and spiritual effect of the interior even as their fragility and complexity make them among the most difficult aspects of the painted fabric to preserve. ¹⁷

The material basis of this colour system is documented in detail. The pigment palettes drew on both mineral and organic sources: five principal colours—white, yellow, red, blue, and green—generated the others, with a full spectrum encompassing thirty-two colour variations documented in traditional artistic knowledge. Exotic mineral pigments such as cinnabar, lapis, azurite, malachite, and orpiment were imported for use in state monasteries with the logistical and financial resources to obtain them, while locally sourced organic materials included indigo, lac, madder, symplocos yellow, earth ochre, gamboge green, earth brown, earth black, and earth white; soot-hue and charcoal black were produced domestically; and black, white, dark blue, brown, rust red, orange, and yellow ochre pigments were extracted from deposits distributed across the country, Wamrong in eastern Bhutan providing three earth colours (ochre, black, and red) and a dark khaki brown earth colour called sindura being found in small quantities at recognized holy mining sites. Lac, madder, symplocos, gamboge, and indigo served both dyeing and painting: indigo, grown in Zhemgang and Tashigang and similar ecozones, provided various shades of blue; lac insects were raised on tsho shing and zizyphus mauritiana in eastern Bhutan, lac exhibiting three superior qualities—translucence, glossiness, and brightness—and being extensively used in powerful ritual actions; madder from rubia manjitha and rubia wallichiana provided a cheaper, more widely available red than lac; symplocos leaves boiled in solution created yellow dyes and, mixed with indigo, produced green shades; and light green derived from boiling and filtering a concentrate of shingkoed, a tropical plant whose resin (gamboge) gave a mustard yellowish green that, mixed with indigo, created a green pigment. Deumar Geshey Tenzin Phuntsho (b. 1673), an outstanding Tibetan art theorist, formulated a comprehensive theory for creating pigment shades through mixing, particularly emphasizing various reds: he distinguished between tinctures derived from lac and vermilion, lac mixtures producing lung-colour tones and vermilion producing liver-colour tones; mixing lac with white produced various tints of na ros, mixing vermilion with white produced tints of dmar skya, and combinations of indigo and lac generated nine tones of mauve; flesh colours resulted from three-fourths white and one-fourth vermilion, with more vermilion creating a reddish flesh colour, while indigo mixed with light vermilion produced a skin colour for older people and orpiment yellow mixed with reddish flesh colour yielded a yellowish flesh colour; and animal colours were similarly systematized into five categories—whitish, reddish, yellowish, maroonish, and bluish animal flesh. ¹⁸

The integration of pigment, technique, and visual effect into a single sacred-architectural expression is summarized in the analysis of painted schemes as a whole, in which ornament and colour function not as applied decoration but as integral to the architectural expression of the building’s sacred purpose and cosmological meaning, pigment choice, material technique, and visual effect composing a unified whole across five centuries of practice. ¹⁷

5 A Typology of Bhutanese Buildings

Where the preceding sections treat materials and architectural language as they cut across the whole built environment, this section organises that environment into its principal building types and describes each in turn. Its purpose is taxonomic and descriptive: to set out the distinct categories of Bhutanese building, their function, siting, plan, construction, and characteristic features, while showing how a shared formal language unites them from the largest fortress to the humblest dwelling. The typology proceeds, broadly, from the most public and institutional to the most domestic. It begins with the dzong, the fortress-monastery that integrates religious and temporal authority within a single fortified complex and stands as the archetype of public architecture in Bhutan (5.1). It then treats the temple (lhakhang) and the monastery (gönpa), the foundational religious types from which much else derives (5.2), and the chorten and its related votive structures—prayer walls, prayer wheels, and wayside shrines—that distribute devotional architecture across the settled landscape (5.3). It turns next to the palace, manor, and elite residence, a category that mediates between fortress and dwelling and that becomes historically decisive at the threshold of the modern monarchy (5.4); to the farmhouse and vernacular dwelling, the most numerous type and the one in which the “Tibetan” character of the tradition is most clearly defined (5.5); and finally to the minor and ancillary structures—bridges, gateways, water mills, and the subsidiary buildings of monastic complexes—that complete the repertoire (5.6). Throughout, each type is presented both as a coherent formal solution and as a living, frequently modified structure, and the section’s organising question is how functional difference is accommodated within a single, recognisable architectural idiom.

5.1 The dzong: fortress-monastery and church–state architecture

The dzong is the archetype of public, political, and collective architecture in Bhutan, and the type that most distinctly expresses the country’s institutional order. It integrates religious and political functions within a single fortified complex, embodying the principle of chos srid gzhung 'brel—the harmonious blend of religion and politics—administratively known as chos srid gnyis ldan, the dual system ⁴². This integration distinguishes Bhutanese dzongs fundamentally from their Tibetan counterparts, where great monasteries and administrative dzongs typically remained separate institutions ⁴²; the dzong combines functions that elsewhere in the Tibetan Cultural Region remained apart ²⁸. The dzong serves simultaneously as fortress, monastery, and seat of government, embodying in its form the integration of spiritual authority, temporal power, and military defence—a typological synthesis unique to Bhutan ⁵. It has been described as Bhutan’s “architectural frontispiece,” exhibiting the very best of what Bhutanese dwelling culture can achieve, and as a “propelling” monument and vehicle of cultural transfer that still accommodates the same political, religious, and logistic functions for which it was originally designed ⁴.

5.1.1 Origins, etymology, and historical development

The dzong type evolved from historical precedents in towers and fortified palaces (khars) ⁴². It has its origins in the strongholds of local chiefs and petty kings of pre-Buddhist Tibet, which often incorporated towers and were placed on rocky eminences overlooking cultivated valleys ^29,30. The term dzong itself carries multiple meanings reflecting this development: originally applied to meditation sites and sacred landscape features visited by Guru Rimpoché in the eighth century, it later acquired connotations of temporal strongholds. According to one interpretation, the term derives from Sanskrit durga, meaning “undestroyable,” and thus describes an “undestroyable stronghold” or, in spiritual terms, an “undestructable stronghold of mind power”—an etymological duality of sacred site and worldly protection that persists in the dzong’s dual function ⁴².

The Bhutanese dzong system was established by Ngawang Namgyel (the Zhabdrung) in the early seventeenth century ⁴². When the first Shapdrung arrived from Tibet in 1616, he set about building monasteries and dzongs (castles) which consolidated and expanded his military and religious authority, and in Bhutan the distinction between castle and monastery became blurred as far as the actual buildings were concerned ^29,30. Recognizing that his increasing power was causing concern in central Tibet and consternation among certain local lamas, the Shabdrung created a building type that unified monastery and fortress into a single integrated structure ²⁸. A total of sixteen historical dzongs were recorded in Bhutan, most built during and shortly after his reign ⁴²; sixteen dzongs are likewise recorded in the monument inventory ⁵. The first dzong was built at Simtokha in 1629 on the trade route crossing Bhutan from east to west; this building differed in both design and purpose from any other in the region, needing to house a substantial monk body, to protect both monks and lay followers, and to serve as a visible and tangible expression of the Shabdrung’s power and the permanence of his lineage ²⁸. Over the Shabdrung’s lifetime and for half a century afterwards, a series of dzongs were built throughout Bhutan as the independent state grew ²⁸.

5.1.2 Function and program

The dzong functioned simultaneously as monastery, administrative centre, and fortress ²⁸. As an instrument of political consolidation and military defence against both internal rivals and Tibetan incursions ⁴², the first system of defensive fortresses was established in the seventeenth century by Shabdrung Ngawang Namgyal, the unifier of Bhutan; these structures played a critical role in repulsing Tibetan and Mongolian invasions, with captured arms still retained as trophies ⁴⁰. Each dzong was strategically positioned—guarding invasion routes from Tibet to the north or India to the south, controlling trade routes and serving as customs posts, or acting as a frontier fortress as Bhutan’s sphere of influence extended eastwards ²⁸. Beyond their military role, dzongs served as barracks and armouries, accommodated local administrators, and functioned as storehouses for agrarian produce ²⁸. The defensive dzong contained everything of strategic importance: the ruling families, administrative offices and records, the monastery, a large granary, and systems of access to underground water; in times of attack it could also provide sanctuary to farmers from the surrounding district ⁴⁰. The outer buildings housed monks' quarters, administration offices, law courts, store rooms, and arsenals ⁵.

Beneath courtyard level, extensive basement rooms stored tax revenues collected in kind, accommodating substantial quantities of rice, buckwheat, flour, mustard oil, daphne bark paper, butter, and meat that constituted the tax system before its conversion to cash payments in the twentieth century ⁴². As the Shabdrung’s rule became more secure, the dzong developed a pronounced social role as a place of congregation and celebration, particularly for the Tshechus, the masked dance festivals ubiquitous throughout the country ²⁸. The dzong’s role as cultural centre is especially evident at the annual festivals of tshechu and dromchoe, where virtually everybody gathers to commemorate the “Great Deeds” of Guru Rinpoche and honour the main protective deities; at such collectively staged rituals the dzong unveils its role as a locus and vehicle of cultural exchange, renewal, and change ⁴. As a governmental institution, the dzong serves as the socio-political and cultural heart of a district (dzongkhag) ⁴, with officials including the Dzongda (dzong administrator) and Dzongrab (dzong official) responsible for its maintenance and governance ¹⁴.

5.1.3 Siting

The dzongs were strategically located, often on ridges with steep slopes on multiple sides, commanding valleys and positioned above river confluences—recognized as power places in geomantic tradition ⁴². White noted that the sites of these fortifications are “unexceptionable...from the point of view of defence,” indicating deliberate siting strategy ⁸. The dzong stands in isolation on a commanding site in relation to the valley, while the population lives in family-scale farm houses dispersed among the cultivated fields ²⁴. The dzong’s prominence in the landscape—highly visible, occupying the crest of ridges that project into gorges—reinforces its role as the visible expression of unified temporal and spiritual authority ⁴³.

The dzong was inaccessible from three sides, leaving only one side relatively convenient for access; this reflected a calculation that the manpower cost of defending all sides would outweigh the inconvenience of limited accessibility ³⁹. The rectangular north–south axis layout of classical dzongs—exemplified by Tashi Chodzong, Puna Dewachenpoi Phodrang, Wangdi Nampar Gyelwai Phodrang, Tongsa Choekhor Raptentse, Tashigang dzong, and Lhuntse dzong—served multiple strategic and functional purposes. The north–south orientation offered three principal merits: it did not face the prevailing winds, which in most valleys flow parallel to the rivers, so that the rectangular body allowed wind currents to flow aerodynamically around it rather than pound against its broadside; it assured that most of the dzong’s surface area received direct sunlight, providing better illumination than an east–west orientation; and the rectangular layout simplified the functional division between monastic and civilian spaces while reducing acoustic disturbance ³⁹.

5.1.4 Layout and spatial organization

The core of any Bhutanese monastery and most dzongs is the temple or temple-block; the administrative dzongs are built on the pattern of a tall free-standing temple-block completely surrounded by a rectangle of buildings that present a continuous wall to the outside ^30,29. The main temple block (utse) of the monastery is surrounded by a continuous wall of outer buildings with access to courtyards, presenting an unbroken wall to the outside, with the monastery often occupying no more than half the total area ⁵. The basic pattern consists of a central tower, the utse, built in the middle of a courtyard, while monks' cells and administrative offices back up against the surrounding walls ^27,21,26.

The physical layout of Bhutanese dzongs typically comprises two separate courtyards: the first for secular administration (Dzongkhag) and the second, inner courtyard for monastic functions and the most sacred spaces ⁴². The entrance is at one end, and the first courtyard entered is largely or entirely given over to non-monastic uses ^29,30. The division into an upper monastic section and a lower civilian section was simplified by the rectangular form, with the main entry positioned near the middle to reduce unnecessary contact between monks and civilians; this also reduced noise from people moving about the dzong, a condition prized when large numbers occupied confined space, allowing silence to prevail ³⁹.

Several distinct typological patterns express the dual function ⁴⁰:

• In some examples, walls surround a large courtyard from which a central commanding tower rises above the outer walls, monks' quarters, and administrative offices ⁴⁰. This single-court form is exemplified by Gasa, Tashigang (Trashigang), and Dagana dzongs ^27,21,26.
• In others, the central tower divides the dzong into two courtyards—one controlled by the clergy, the other by the temporal authority ⁴⁰. Punakha, Wangdi Phodrang (Wangduephodrang), and Thimphu have two separate courtyards delimited by the central tower ^27,21,26.
• A third group follows neither pattern but is built to accommodate the rugged terrain on which it stands, suggesting that site conditions and topography shape the formal organization as much as programmatic requirements ⁴⁰. Courtyards and buildings are sometimes constructed on different levels following the slope of the terrain, as at Paro, Jakar, and Tongsa (Trongsa); Tongsa is the most complex of all, with its maze of courtyards, buildings, and passages on different levels ^27,21.

The non-monolithic construction of dzongs as ensembles of separate buildings set at different foundation levels, connected without gaps, created visual continuity while allowing functional flexibility. Tongsa dzong exemplifies this approach, organized around five courtyards at five different ground levels, connected by high stone stairways except between two quadrangles linked by inclined cloistered corridors. This ensemble method allowed dzongs to deviate from a perfect rectangle to curve, zigzag, broaden, or narrow according to functional requirements and the physical features of the hills, and permitted the construction or repair of individual sections without addressing the entire structure ³⁹. The typological variation—from the simple single-court form to the complex multi-level arrangement of Trongsa—demonstrates how a consistent organizational principle accommodates functional and topographic variation; the dzong is thus not merely a building type but a spatial and institutional system ²⁶.

5.1.5 The utse (central tower)

The central tower structure, the utsé (dbu rtse), houses the main shrines and represents the typological descendant of ancient defensive towers ⁴². It is characteristically square in plan, with an increasing number of openings in its massive walls as one ascends, creating more accommodating upper floors; in some examples, such as Tongsa dzong’s Chorten Lhakhang, the utsé preserves remains of earlier structures at the site ⁴². The central and most valuable part of the fortress, the utse (literally “top head”), is the tallest structure, housing prized temple statues and serving as the residence of the highest spiritual figure of the monastic section; during the theocratic period the central tower of Tashi Chodzong functioned as the summer residence of the Desi ³⁹. The utse serves simultaneously as the central tower accommodating the most important temples and as a keep ⁴³. The utse at Trongsa is believed to date from 1543 and is thought to be a derivative of the Khar towers of Tibet, indicating the dzong’s relationship to broader Himalayan architectural traditions while maintaining its distinctive Bhutanese form ⁴³.

5.1.6 Defensive apparatus

Defensively, the dzongs were formidable structures. They were defended by archers operating through narrow loopholes in the walls, and many were supported by free-standing bastions positioned at strategic points in the surrounding landscape; specialized structures called Tadzongs (blta rdzong) and Chu-dzongs protected water supplies ⁴². The fortress characteristics were essential: people seldom occupied ground floors during the period of endemic warfare, and internal wooden structures—notched tree trunks that could be drawn up like miniature drawbridges—provided defence against raids ⁴². At Paro, the dzong stands on a rock on the eastern bank of a river, with the entrance protected by a drawbridge above a dry ditch; guardrooms flanking the entrance housed mastiffs, a fortified enceinte reinforced with square towers surrounds the monastery, and a covered way leads to the chu tower (water tower) providing water under siege; a fortified bridge connects the fortress with the opposite bank ⁴³. The dzongs, although physically dominated by their temples and housing hundreds, even thousands, of monks to this day, were obviously built as defensive strongholds and most have been besieged a number of times ^29,30.

The covered passageway running through Trongsa dzong from western to eastern gateway enabled monitoring and control of traffic crossing Bhutan, demonstrating how spatial organization served administrative functions ⁴³. Drukgyel dzong, built in 1647 to protect the Paro Valley, unusually contains three courtyards, the first serving as stables, indicating functional differentiation within the fortress-monastery plan ⁴³.

5.1.7 Outlying fortifications and defensive towers

To protect dzongs from overlooking high ground within catapult range, outlying forts were built to prevent access to such positions. Known as ta (or defence) dzongs, these structures served a critical defensive function ²⁸. The tadzong (watchtower) functioned as an integral element of dzong defence and administration: positioned deliberately above the dzong and within line of sight, the cylindrically shaped tadzong provided almost 360-degree perspective of surrounding valleys and mountains, particularly over the dzong and nearby bridges controlling access, and was placed within hearing distance and firing range of advanced matchlock guns ³⁹. Its five routine functions were: overseeing and monitoring movements of people and events throughout the valley; observing activities within the dzong itself; keeping watch over vital ancillary installations such as water supply, fuel stacks, and other supplies kept outside the dzong; housing guards and ammunition to enable immediate response to detected threats; and communicating with those inside the dzong through messengers or, in emergencies, by shouting—the upper storeys of the utse likely providing the optimal acoustic location for such emergency communication ³⁹.

The ta dzong at Paro is circular, of seven storeys, with walls 2.5 metres thick; previously used as a prison, it now houses the National Museum, and internally a removable staircase isolates the top three storeys, with an underground passage reputedly running down to the dzong it overlooks ²⁸. The ta dzong at Trongsa is a complex fortification dominating the lower-lying dzong on a mountainside crest; colloquially known as the Tiger’s Fortress, it was built to protect the dzong builders. This dzong, constructed on the orders of the Shabdrung as a springboard for his conquest of the eastern part of Bhutan, was started in 1647 ²⁸. The Trongsa ta dzong comprises a five-storey round tower containing two temples, connected from its south-east and south-west aspects to two smaller round towers at a lower level by covered ways running about 20 metres; further down the mountainside are two isolated round towers that flank the fort ^28,43. At some distance from these fortress monasteries, isolated watchtowers were built up and down the valleys to give early warning of approaching belligerents so that the dzongs were not caught unawares ²⁸.

5.1.8 Construction, materials, and visual character

All dzongs are built of stone ²⁷. The solidity and elegance of the inward-leaning (sloping) stone walls, combined with richly detailed woodwork and the ethereal character of the pitched roof, make the dzong one of the most beautiful architectural forms of Asia ^27,21,26. Like traditional houses throughout Bhutan, dzongs are constructed without the use of nails or metal hinges ⁴⁰. The architectural form—sloped walls, deep roof projections, regular fenestration—serves both functional and symbolic purposes; the sloping walls and deep projections of the roofs are adapted to both defensive necessity and the wet climate ⁸.

From the outside, dzongs share with Tibetan buildings the characteristic of seeming to float or soar, despite their extreme solidity; Punakha Dzong in particular looks like a huge ship riding at anchor in the valley. This soaring effect is perhaps partly due to the subtle inward taper of the walls as they rise, combined with the concentration of ornament towards the top and the jutting roofs. The huge white expanses of wall are set off by the narrow band of red, the brilliantly painted woodwork of the windows, and the glitter of gold ornaments; the sudden glimpse of one of these vast white buildings, nearly always dramatically sited, is breathtaking. From the inside, the eye is caught by the brilliant colours painted on all the woodwork in vivid combinations, contrasting with whitewashed walls and stone-paved courtyards ^29,30. The interior surfaces are richly decorated with paintings and slate engravings, which on festive days serve as the backdrop for artistic treasures brought out for display; the painted frescoes of protective deities, combined with the grandeur and majesty of the dzong, encapsulate Bhutanese culture and architectural identity. The dzong’s exterior presents a stony, fortified face to the world, while the interior walls are traced with wooden balconies and galleries faced with richly coloured, painted wood—a contrast distinguishing the public defensive envelope from the ornate interior realm ⁴⁰.

5.1.9 The dzong as a living institution: conservation and modification

The dzong is a living building, continuously occupied and modified. Tongsa Dzong has been singled out as the clearest example of the conservation issues facing historic monuments in Bhutan, said to combine all the problems that have to be solved; it is of major historical importance as the ancestral home of Bhutan’s royal family, with a unique architecture displaying the intricacies of an elaborate fortress protected by a series of watchtowers ¹⁴. It is a living building housing twenty temples and congregational halls with more than 250 monks in permanent residence and an administrative centre for the district, located at an altitude of 2,200 metres on a ridge dominating the Mande (Mangde) river and commanding the passage between east and west Bhutan; it was built in 1543 A.D. and enlarged in the mid-seventeenth century by the governor of Tongsa Migyur Tenpa (1613–1680) ^14,9. Some restoration work was undertaken at Tongsa in 1985–1986 (timber structures and floors) on the western side ¹⁴.

The survey identified that dzongs suffer from poor drainage in courtyards, inadequate water supply and sanitation, and that the large roof structures place severe loads on walls, particularly in pisé de terre; restoration at Punakha dzong (from 1987) and Wangdi Phodrang dzong (from 1983) involved replacement of floors, pillars, and staircases, indicating that the type accommodates functional change while maintaining its institutional role ⁹. At Tongsa the zimchung (living quarters of high-ranking officials), located on the southern side, is the oldest and most damaged section ⁹.

5.1.10 Documented examples

White’s documentation identifies the dzong as a primary architectural type, recording photographs of major fortifications: Duggye Jong, Paro Jong, Tassicho Jong, Poonakhaa Jong, Angduphodong Jong, and Tongsa Jong ⁸. Visits are also recorded to Drugyel, Paro, Wangdi Phodrang, Tongsa, Tashigang, Lhuntsi, and others ¹⁴.

Simtokha Dzong. The first dzong constructed by the Zhabdrung, in 1629 ⁴², it is the smallest and simplest in layout ^29,30. Its layout follows the basic structure of Tibetan and Bhutanese temples, forming a rectangle approximately 70 by 60 metres, entered from the south through a single entrance opening onto a courtyard that surrounds the central tower, the courtyard enclosed by two-story structures housing monastic quarters, all opening inward ⁴². The woodwork is simple and obviously old, very worn in places, and the general scale rather small; nevertheless it is very well and solidly built of dressed stone, with walls that have a pronounced slope tying the building securely into the irregular hillside. Since Bhutanese farmhouses are built of rammed earth, the dressed-stone construction and detailing may have been the work of craftsmen from Tibet itself. The main temple-block, square in plan, consists of a central chamber rising from the ground to the roof, with three storeys of galleries and roofs around it, and a tall standing image of the Buddha occupies this main chamber. The rooms in the outer wall are arranged in two storeys, lined by columned arcades on the inside, housing the monks' and abbot’s quarters and (at the time of description) a small school ^30,29.

Paro Dzong. Built on the same lines and on the same type of site, but much larger and more ornate. The courtyard surrounding the central temple-block is on different levels on each side of the main temple, and many surrounding rooms, especially on the higher side nearer the entrance, are used as offices for the administration of the surrounding region ^30,29.

Punakha Dzong. The most important dzong, built in 1636–37 and named spung thang bde chen pho brang rdzong, “heap of field and great bliss.” It served as the winter residence of the Zhabdrung and his court, with the Zhabdrung’s private quarters in the utsé; designed to accommodate six hundred monks, by the end of the Zhabdrung’s reign the resident state monks numbered more than 360, reaching the original target about fifty years later. Punakha remains the most sacred of all Bhutanese dzongs and continues to function as a living religious and administrative center ⁴². It is the largest of the three principal dzongs described and the only one built on level valley land; the central temple-block is of five storeys and towers well above the surrounding walls, the entrance courtyard used solely for offices and storerooms, with monastic quarters set around two courtyards beyond the temple and in a large building at the far end ^30,29. The dzong’s layout organizes around multiple courtyards: the first courtyard (doshen) houses the civil wing; the second provides access to the central tower (utse), which houses temples and the apartment of the first Zhabdrung; and the third provides access to the Machen Lhakhang (where the embalmed body of the first Zhabdrung is kept with sacred relics) and to the monks' great assembly hall (kunre). Its position at the confluence of two rivers, made accessible by traditional cantilever bridges, reinforces its role as a distinct institutional and spiritual centre ⁴.

Paro and Punakha Dzongs have certainly been subject to much rebuilding but are likely to have retained their original layout, which keeps to the pattern established at Simtokha and found in other Bhutanese dzongs; in all three the main temple is square in plan, while the surrounding buildings take on an elongated shape leaving large courtyards in front of and behind the central block, with only narrow passages on either side ^30,29.

Tashichö Dzong (Tassisudon / Tashicho Dzong). Davis’s account of 1783 documents the dzong as an integrated fortress-monastery and seat of temporal and spiritual authority. The palace is an oblong structure about two hundred yards in front and a hundred in depth, divided within into two squares by a separate building raised in the centre, more lofty and ornamented than the rest; in this central structure the Rajah and principal officers reside, with a square gilded turret on top said to be a lama’s habitation. One square comprehends the chapel and apartments of the priests; the other is allotted to the officers and servants of government ^16,20. The building accommodates three functional zones: the Rajah’s residence and principal officers in the central structure, the religious establishment in one square, and the administrative apparatus in the other ¹⁶. The chapel is often an apartment of two stories, with part of the upper railed as a gallery from which spectators may view the ceremonies below; the altar is furnished with a colossal gilt figure of Syatoba, a smaller figure identified as the vizier, rows of diminutive images of former Lamas, and the destroying power with enraged countenance and numerous uplifted arms ¹⁶. Walls are of stone and clay, built thick with greater inward slope than European buildings; the roof has little slope, is covered with shingles held down by large stones, and projects considerably beyond the walls; access between stories is by ladders, though a large flight of stone steps exists at one of the two gateways ²⁰. The walls are lofty, upwards of thirty feet high; above the middle space a row of projecting balconies has curtains of black hair drawn at night; below, the walls are pierced with very small windows; a tower five or six stories high rises in the middle, appropriated to the supreme Lama. The palace contains near 3,000 men and not a woman, of whom about 1,000 may be gylongs; it was entirely rebuilt except for the central citadel and one temple in the late 1960s ⁶. The dzong divides into two unequal portions by a high wall, the larger southern section containing the square tower with chapel and Dharma Raja’s apartments, and the northern section occupied entirely by Ta-tshang lamas ³.

Davis records that the government of the whole country was completely in the hands of the priests; the Rajah, though temporal ruler, was theoretically subordinate to the young Lama from Lhasa, who was kept secluded from public concerns at a small castle about a day’s journey from Tashichö Dzong, though in practice the Rajah would not admit temporal control ¹⁶.

Punakha (Panaka), as described by Davis. One of the most ancient and considerable of the Rajah’s castles, it exemplifies the general form: two courts or divisions, the first surrounded with two or three stories of verandaed apartments for servants, government, and fighting men, the other appropriated to priests, their habitations, chapels, and altars. In the centre always rises a more lofty fabric for the Rajah’s use, crowned with a gilt turret said to be his sleeping-room; this central structure serves the same purpose as the keep of old English castles and might hold out after the rest of the fortress was lost. The outer court is filled with earth and raised twenty or thirty feet above the ground outside, with storehouses beneath having loopholes but no windows; the entrance is through a single gate, not flanked or defended by any part of the building. Such a place would be impossible to take by assault and not easy to break by artillery ²⁰. White’s account describes Poonakha-jong’s division into distinct functional zones: the first court contains the main citadel housing the chapel and private apartments of the Dharma Raja, flanked by two-storied residences of lay officials; subsequent courts contain the larger and smaller Durbar Halls where state ceremonies occur; and the final court is given entirely to the Ta-tshang, or State lamas (approximately 3,000 souls), with the large temple in the centre and lamas' cells on two sides. A high, strong wall divides the lay and monastic sections, surmounted by a row of white chotens protected by a double roof; the interior courtyard contains an extremely fine hall of audience or worship, 120 feet square and at least 50 feet high, well-lighted and decorated with fresco paintings, with a succession of chapels on the west side. The dzong’s defensive architecture—the parallelogram plan, cantilever bridges with defensive towers, massive masonry walls, and water-filled fosse—protects this unified authority structure ³.

The castle of Chuka (Chupka / Kepta). Probably built in the late seventeenth century to guard the trade route south to India and to control the surrounding district, it is a large square building on elevated ground with only one entrance by a flight of steps through a spacious gateway with large heavy doors; built of stone with walls of prodigious thickness, it is composed of three separate buildings which, with a wall on the fourth side, enclose a quadrangle courtyard, forming a post of ample dimensions and sufficient strength for defence in a region difficult of access. It stands about half way up the mountain in a bleak but romantic situation ⁶.

Wangdu Phodrang. (Discussed further under the palace type in §5.4, as a consecrated habitation where the Deb Raja resided part of every year.)

5.2 The temple (lhakhang) and the monastery (gönpa)

Temples and monasteries form a distinct religious-architectural category that, while sometimes integrated within dzongs, also exists as an independent type. The temple (lhakhang) appears to represent the earliest form of religious architecture in Bhutan, and some examples are centuries old ^26,21,27. The word lhakhang means “house of gods”; in the Bhutanese Buddhist context, “gods” refers to enlightened beings such as the Buddha, his followers, and other deities, and the lhakhang is a structure that houses sacred objects and provides space for religious activity ¹².

5.2.1 The temple (lhakhang): form, type, and the “house of a divinity”

Lhakhangs are fairly small buildings of simple design, typically of one storey (or one to two storeys) arranged around a small enclosed courtyard. They differ from ordinary houses by the red band painted on the upper part of their walls and an ornament of gilded copper on the roof. Inside, the walls are completely covered with paintings, and the interior space is sometimes divided by pillars into an antechamber and the sanctuary proper. They are maintained by a caretaker (sacristan) who may belong to the owner’s family if the temple is private, or be assigned by the state clergy if it is state property; there are usually several lhakhangs within one monastery or fortress ^21,27,26.

A core conceptual point clarifies the relationship of the temple to the dwelling: a temple is essentially the house of a particular divinity. At Talo, the principal divinity is the deified first Shapdrung. In construction the temple breaks no new ground—it is, in effect, an overgrown house, its arrangement from pitched roof down to the lowest storey practically identical to that of the farmhouse; it is distinguished from the ordinary house chiefly by its size and by its decoration, in particular the horizontal band of red towards the top of the whitewashed walls, never found on an ordinary farmhouse ^29,30.

White’s photographic record documents monastic and temple architecture (Guru Lhakhang, Parotaktsang, Gorina, and references to the Lhalung Monastery and other religious structures), noting that these buildings employ the same constructional system and formal language as secular architecture—stone masonry walls, timber roof frames with deep projections, sloped outer walls—but are distinguished by their interior organization and ornamental program. In Sikhim, the Lepchas and Bhutanese are good carvers in wood, and all the interior decorations of the temples are first carved in wood and subsequently painted, indicating a systematic approach to interior treatment in which carved timber elements are integrated into the spatial and liturgical organization ⁸.

5.2.2 The early temples: the foundational type

The early temples of Bhutan, identified within the mTha'-dul Yang-dul scheme, represent a distinct typological category and the foundational type of Bhutanese temple architecture. They are characterized by solitary siting, diminutive scale, and simple architectural form—features distinguishing them from later, more elaborate construction ^1,2. Byams-pa'i lHa-khang in the Chos-'khor valley of Bum-thang (identified as Bum-thang (7) in the scheme) is solitary and diminutive, uncharacteristic of later Bhutanese temples even in their original shrines; its central image is Vairocana, typically a sign of antiquity. The temple of sKyer-chu in the sPa-gro valley, similarly small in scale, is the second Bhutanese temple in the scheme. The temple of dKon-mchog-gsum, identified as the former rTse-lung, is comparably diminutive and contains a Vairocana image ¹. The dKon-mchog-gsum temple exemplifies the type, being of a solitary diminutiveness even smaller than the original shrines of sKyer-chu and Byams-pa ².

The central image type is predominantly Vairocana, serving as a marker of antiquity; the temples' forecourts contain associated votive objects—bronze bells and megalithic pillars—establishing the temple as a focal point for ritual and spiritual practice ². These temples functioned as focal points for local cult practice and as repositories for sacred images and objects, and incorporated pre-Buddhist sacred sites into Buddhist temple complexes: gSum-phrang in the U-ra district of Bum-thang preserves a “self-created stone pillar” (rang-byon rdo-yi ka-ba) within its principal shrine room, and Bya-dkar lHa-khang preserves a large stone in its immediate vicinity with possible prehistoric associations. They served as centres for the recovery of gter-ma (hidden teachings) by later treasure-discoverers such as Padma Gling-pa, indicating continued ritual significance ¹. The temple of Chu-stod Nam-mkha'i lHa-khang contains an image of the Buddha described as having “dropped from the sky” and functions as a focal point for local cult practice devoted to pre-Buddhist deities ². The architectural simplicity of these early temples contrasts with the more complex, multi-storied structures of later construction; their original contents—clay images, bronze bells, and megalithic markers—have been preserved through successive restorations, establishing a pattern of continuity in which later work is added to earlier foundations rather than replacing them ².

5.2.3 Spatial organization of the temple

Temples and monasteries are arranged on a temple-block and courtyard plan. The main temple is raised on a semi-basement storey and is usually of three floors, each divided into three main rooms, the largest in the centre; the rooms on the upper floors are chapels. The main windows look out to the front and to the two sides in the form of triple-bayed balconies, each one wider than the one immediately below. These religious buildings are distinguished by their decoration: walls whitewashed with a horizontal band of red at the top. The favourite site is the top of a spur above the valley floor, commanding magnificent views ⁵.

The temple type accommodates a hierarchical spatial sequence. Tamshing’s plan includes a main courtyard, entrance porch, inner courtyard, veranda, vestibule, antechamber, and cella, with mural paintings and altars; inscriptions are often found in the entrance porch or near the altar, recording construction or restoration dates, lists of donors, and names of monks in charge ^14,9. The Tamshing Lhakhang is a two-storeyed building containing a circumambulatory corridor on both ground and upper floors around the Guru Khang and Geongkhang (cellas containing the main divinities). Its sole entry opens southward into a walled, nearly square courtyard on the western side—likely a later addition, as evidenced by differences in masonry and joints. In front of the Guru Khang stands the Tshokhang (Kunrena), a large rectangular space for monks to perform ceremonies, open to the ceiling over the upper floor and forming a running gallery on four sides of the first floor. The main entry is covered by a roof forming a loggia, in which the four main guardians are depicted at both sides of the door; the building’s organization around central cellas, the circumambulatory circulation, the ceremonial space, and protective iconography at the entry all characterize the lhakhang as a type dedicated to the veneration of principal divinities and the performance of monastic ritual ¹⁰.

The Guru lhakhang at Dechenphug, constructed around 1936 (about sixty years before the conservation project), is a modest but complete example: two storeys, the ground floor a single undifferentiated room directly accessible from the court (used for storage or occasional lodging), with an external stair ascending to an upper floor where a small vestibule gives access to the sanctuary. The sanctuary is dedicated to Padmasambhava (Guru Rinpoche), represented in a canvas painting marouflaged to the western partition, and is lit by windows for viewing the sacred image. The structure consists of timber-framed walls with earth mortar infill, “rustically and lightly constructed” in comparison to more formally executed buildings—exemplifying the functional simplicity of the type: a modest shelter for a sacred image, accessible to pilgrims, with minimal ornament and direct material expression ¹¹.

5.2.4 The monastery (gönpa): two principal types

Temples may exist alone in the countryside, singly or in groups; a few small houses for monks will transform such a temple into a small monastery ^29,30. Bhutanese monasteries (gompas) fall into two principal types ^26,21,27:

• The ”cluster” (or “group”) type, probably the older, consists of a nucleus of one or two temples surrounded by various residential buildings grouped around the temple. Examples include Dzongdrakha in the Paro valley, Phajoding in the Thimphu valley, and Tharpaling in the Bumthang valley ^26,21,27.
• The ”dzong” type is built like a fortress with a central tower enclosing the temples, surrounded by exterior walls against which monks' cells and service rooms are built. The most impressive examples are Gangtey (near Pele La / Pellela pass), Tango in the upper Thimphu valley, Talo near Punakha, and Drametse (Dramitsé) in eastern Bhutan ^26,21,27.

Cheri Monastery, built in the upper Thimphu valley in 1619–20, exhibits characteristics of both types: the central building is a dzong, surrounded by clusters of houses for meditation and retreat ^26,21,27. The monument inventory distinguishes temples by ownership and institutional status, recording 525 temples owned by the State and in the custody of the Monk Body, 144 owned by incarnate lamas (laju lhakhangs), 800 owned by village communities (miser lhakhangs), and 500 in private hands (ger lhakhangs)—a social and institutional hierarchy expressed in architectural form and ownership ⁵.

Many established monasteries are built in the distinctive style in which a tall temple-block forms one side of a square courtyard whose other three sides are cloistered and serve as accommodation for monks; although such monasteries are often called dzongs by local people, they are distinguished from the larger administrative dzongs by their layout and function ^29,30.

5.2.5 The monastery as an enlarged farmhouse: Talo

Talo monastery exemplifies the temple-block and courtyard plan. It is sited on the top of a spur, on a patch of comparatively level ground where a small village has clustered, a good thousand feet above the valley floors; it commands magnificent views, and defensive possibilities were doubtless in mind when it was built. The whole building faces southeast, with the main entrances of both courtyard and temple-block facing that way. The courtyard entrance is a pillared porch approached by a flight of steps, in practice little used—entry is normally gained via small doorways where the cloisters meet the temple-block, leaving room for the circumambulation-way round the latter, marked by a continuous row of prayer wheels set into the temple wall and walked clockwise ^29,30.

Inside the courtyard, the three sides not occupied by the temple-block are of two-storey construction: above a pillared arcade behind which are living quarters, the upper storey is faced with the same wooden frame and panelling found on the upper storeys of farmhouses, and is largely given over to small chapels and the Shapdrung’s (now unoccupied) personal quarters. The main temple is entered by a further flight of steps, since the block is raised on a kind of semi-basement storey. The temple is of three main floors, each divided into three rooms (a large central one with two smaller flanking chambers): on the ground floor the central space is an entrance hall with staircases, the side rooms used for storage; the upper floors are all chapels, with the largest and principal one at the top in the centre, occupied by images of most of the Shapdrungs, with the first, Ngawang Namgyel, in the centre. The temple-block carries an extra pitched roof on top of its flat roof, with a very small turret or third roof added at the top in the middle; its main windows form triple-bayed balconies, each slightly wider than the one below. A basement storey around the three lower sides of the courtyard, accessible only from outside, houses cattle and livestock, and the weight of the whole is carried by massive walls of beaten earth on stone foundations. The analogy with the ordinary farmhouse is immediate—from the pitched roof sheltering the “master of the house” at the top to the cowsheds at the bottom—the Bhutanese having specialized in this logical arrangement, since a temple is essentially the house of a divinity ^29,30.

5.2.6 Temples and monastic spaces within dzongs

Within the dzong complex, temples serve as integral architectural and spiritual components, accommodated within tower structures and within the buildings surrounding courtyards; at Trongsa the five-storey utse contains two temples, and the dzong as a whole contains about twenty temples ^43,4. The Machen Lhakhang, in the third courtyard of Punakha Dzong, houses the embalmed body of the first Zhabdrung along with the Rangjung Karsapani (the sacred relic he brought from Tibet, Bhutan’s most sacred relic) and the remains of the saint Pema Lingpa (1450–1521); its reconstruction, completed in 1991, exhibits a morpho-typological resemblance to important temples such as those at Ura and Kurje in Bumthang while introducing new materials and techniques—cement concrete and in-situ concrete casting employed in the service of traditional configurations inherent to timber architecture, with frescoes and sculptures formerly built in timber now cast and sculpted in concrete. The monks' great assembly hall (kunre) at Punakha, credited to Desi Tenzing Drugda (1656–67) and known as the “hundred-pillar” congregation hall, demonstrates exceptional architectural standard and historical value, with mural paintings and cosmic mandalas ⁴.

Davis observed that the priests had no separate buildings erected purposely for ceremonies in the manner of churches, pagodas, or mosques; their devotions were always performed before altars in large apartments within the palaces or castles where the Gylongs were lodged—these residences being, in fact, the temples. The chapel interior is organized around a central altar bearing a colossal gilt figure of the supreme deity, Syatoba, sitting cross-legged; before the altar a bench holds small brass cups of water and rice, a burning lamp, pots of flowers, and many small ornaments, with mirrors and glass-ware thought great embellishments. The chapel often comprehends two stories, part of the upper railed as a gallery for spectators ¹⁶.

Monastic structures within and adjacent to dzongs follow consistent architectural and decorative conventions. The large temple at Poonakha’s Ta-tshang section measures 120 feet square and at least 50 feet high, with a lofty roof, well-lighted interior, and fresco paintings, hung with embroidered Chinese silk canopies and brilliantly coloured silk hangings (chenzi and gyentsen). Chapels within dzongs are consistently furnished with high altars and Buddha images; at Tashi-cho-jong one chapel presented by the Deb Nagpo contained 1,000 images of Buddha (more than 600 counted), with a pair of elephant’s tusks supporting the altar as an essential ornament; at Simtoka-jong the chapel contains one of the finest bronze images of Buddha observed, flanked by standing figures more than life size beneath a magnificent carved canopy. The architectural treatment of monastic spaces emphasizes fine carved and painted decoration, with pillars and canopies carved and overlaid with open hammered metal scrolls ³.

5.2.7 Construction and the columned order

The temple breaks no new ground in construction ^29,30. However, the system of columns and beams used to help hold up the ceilings in monastic buildings is purely Tibetan and rarely seen in Bhutanese farmhouses, though developed from the columns often used in Tibetan farmhouses. It has been standardized by the Tibetans into a regular “order” with a set arrangement of components, all borrowed ultimately from the Indo-Iranian world and imported into Tibet along with the rest of Buddhist culture. The columns taper slightly upwards and in Bhutan are commonly square in section with slightly fluted faces; near the upper end is always a constriction or “neck” traceable back to Achaemenid Persian architecture, often ornamented with Indian hanging garland or vase-and-foliage motifs. The column swells out again and is recessed to hold the capital, which—unlike the square Greek and Roman capitals—follows a common west and central Asiatic style in being elongated along the beam it supports, the Tibetans carrying this elongation to extreme lengths so that one capital sometimes touches the next, its outer faces carved in a swirling cloud-like outline ³⁰.

The presence of ornamental columns signifies a monastery’s importance: at Buli Monastery the ground-floor vestibule contains two twelve-sided Kachens (ornamental columns), with twelve four-sided Kachens distributed across the upper floors, traditionally installed to signify the monastery’s status within the religious and cultural hierarchy ¹³.

5.2.8 Documented monasteries and temples

Tenzin Rabgye’s reign witnessed the construction and restoration of numerous temples and monasteries, many previously existing as family hermitages, with the state’s investment recorded in detail—accounts of materials expended and the names of chief artisans—indicating that temple construction was a documented and formally organized undertaking ⁴⁴. A planned great sKu'bum near Punakha, modelled on the Gyantse monument, was to be built with sketches and measurements prepared by Nyingmapa assistants sent to Tibet; though unrealized, it demonstrates the ambition of temple architecture and the practice of adapting Tibetan precedents ⁴⁴.

Taktsang Lhakhang. Founded in 1692 by Gyalse Tenzin Rabgye and formally known as Gu-ru mTshan-brgyad Lhakhang (”The Temple of the Guru with Eight Names”), it was erected at Taktsang Pelphug, a sacred cave long associated with Padma Sambhava that had served as a meditation residence and ritual mandala for centuries before the temple was built ^44,45. Construction reveals the organization of temple building under state patronage: Tenzin Rabgye assigned his chief artisan Grags-pa rGya-mtsho (1646–1719) to supervise the work according to a design the patron laid out on the ground, encompassing the main structure, a gilt cupola, and interior artwork, with a special appliqué hanging (thongdröl) of the eight forms of Padma Sambhava created under the direction of the personal attendant sPrul-sku 'Brug bsTan-dzin using fabrics brought from Lahore. Work began in the tenth month of the Water Monkey year (1692) and was substantially complete by 1694, when Tenzin Rabgye returned to consecrate it ^44,45. The cliff-face location presented distinctive challenges: stone stepways along the rock chasm were narrow and dangerous, yet the structure accommodated large gatherings; after Tenzin Rabgye’s ritual activities a spring began to flow from a cave, called “Our Precious Lord’s Miracle Spring.” The founding was inseparable from liturgical function, establishing an annual Tshechu celebration in the fifth month, so that the temple served simultaneously as votive structure, pilgrimage destination, and venue for communal ritual ⁴⁵.

Situated at 2,950 metres and clinging to black rock overhanging the Paro valley by 800 metres, the Taktsang complex contains thirteen holy places. According to tradition, Guru Rinpoche arrived in the eighth century flying on a tigress and meditated three months in the cave, converting the Paro valley to Buddhism in his terrifying form of Dorje Droloe. His disciple Langchen Pelkyi Singye later meditated there in 853, giving the cave its name (Pelphug, “Pelkyi’s cave”); his body was returned miraculously and sealed in a chorten, restored in 1982–3. The first sanctuary probably dates to the fourteenth century, built by Sonam Gyeltshen, a Nyingmapa lama of the Kathogpa branch; the site remained under Kathogpa authority until the seventeenth century. In 1645 it was offered to Shabdrung Ngawang Namgyel, who wished to build a new structure but died before doing so; the Fourth Desi, Tenzing Rabgye, fulfilled this wish in 1692, building the structures visible today, later restored in 1861–5 (under the 34th Je Khenpo, Sheldrup Oezer) and most recently in 1982 ³⁸. The iconographic program throughout deploys the three principal Nyingmapa cycles—Phurpa, Kagye, and Gondu, all first preached by Guru Rinpoche—across a series of temples (a profoundly sacred diminutive first temple containing the meditation cave behind a carved wooden grille; a medium-sized second temple, “the temple of the Guru statue which speaks”; a large third temple; and additional temples above the main building, plus three further venerated complexes: Taktsang Ugyen Tsemo (first built 1408, rebuilt after a 1958 fire), Taktsang Oezergang (1646), and Taktsang Zangdopelri (1853)) ³⁸.

Kyichu Lhakhang. Composed of twin structures, it demonstrates the formal and historical coherence of the lhakhang type. By tradition the first temple was built by the Tibetan king Songtsen Gampo about AD 638, as part of a program of 108 temples positioned on the body of a demoness; Kyichu was built on her left foot and belongs to a group of four “subjugating regions beyond the frontiers.” Guru Rinpoche later visited for meditation. The documented history is unclear until the early thirteenth century, when it came under the Lhapa school, passing under Drukpa protection around the end of that century. In 1839 the 25th Je Khenpo, Sherab Gyeltsen, ordered a restoration and donated a thousand-armed, thousand-eyed Avalokiteshvara statue. The sanctuary contains the Eight Bodhisattvas and the Jowo (Buddha as a prince of eight years), similar to the one in the Jokhang of Lhasa. In 1968 H.M. Ashi Kesang, the Queen Mother, arranged for a second temple in identical style, so skilfully built that no difference is discernible; this modern temple is dedicated to Guru Rinpoche and to the Kagye ³⁸.

Dungtse Lhakhang. Built in 1421 by the Tibetan lama Thangton Gyelpo (1385–1464), it is remarkable as the only temple in Bhutan built in the form of a chorten, except for the Memorial Chorten in Thimphu. Situated on a hill (believed to be a demoness’s head) between the Paro and Dipchari valleys, it was constructed to overpower the demoness—chortens serving as a nail immobilizing a demon while proclaiming Buddhism’s victory. Restored in 1841 under the 25th Je Khenpo (with donors' names inscribed on the ground-floor columns), it possesses one of the most extraordinary collections of paintings in Bhutan or the Himalayan world, conceived as a mandala whose storeys correspond to ascending levels of initiation; the third floor displays the great Tantric deities and the Eighty-Four Mahasiddhas, with a magnificent statue of Milarepa ³⁸. (Its three-dimensional cosmological structure is discussed further under the chorten type, §5.3.)

Tachogang Lhakhang. A private temple founded by Thangton Gyelpo on the left bank of the river a few kilometres before Chhuzom, built around 1420 after he had a vision there of the excellent horse Balaha (an emanation of Avalokiteshvara), in addition to one of his famous iron bridges, later carried away by floods in 1969 ³⁸.

Tamshing monastery. Located on a river terrace on the left bank of the Chamkar river not far from Jakar dzong, founded in 1501 by Pemalingpa (1450–1521); it consists of two chapels on two levels with a vestibule, distributed around a courtyard with the main temple on the northern side, and houses a monastic community of forty members that came from the mother monastery of Lhalung in Tibet in 1959 ^14,9.

Tamchog (Tamchog) Lhakhang. Located on the left bank of the Parochu and built by Thangtong Gyalpo, it is a three-storey massive building surrounded by a courtyard and, on the western side, by ancillary buildings; its mural paintings, although mostly recent, are of excellent quality ^14,9.

Buli Monastery. Located at Gyatsa village in Chhume Gewog (Rumthang), founded by tradition in the fifteenth century by Choeying, the “heart son” of Terton Dorji Lingpa (1346–1405), and extended in the early twentieth century. It is historically important as the place where Desi Jigme Namgyel, father of the First King, stayed before proceeding to Trongsa and received blessing from the Buli Lama Shakya Namgyal; it functions as a living religious centre, hosting the Buli Mani festival every two years ¹³.

Choedrak. Classified as a lhakhang complex, its main lhakhang resembles typical Bhutanese dzong and monastery architecture—whitewashed tapering stone masonry walls with wooden windows, a floating-like roof, and colourful interiors. The complex consists of the main temple building with other structures flanking a central courtyard; ancillary structures include a residential unit for the Choedrak lama, guest rooms, and a small butter-lamp offering unit near the entrance, with a choeten at the centre of the courtyard dedicated to Geshe Zhudap Tenpa Rinchen. The altar rooms are named after the major statues they house: the first floor is the Guru lhakhang, the second the Lama lhakhang, and the third connects to the Goenkhang—a restricted protector-deity shrine within the sacred cave, entry to which is customarily restricted for those who have had recent contact with dead bodies, recently given birth, or are menstruating. Choedrak functions primarily as a secluded retreat rather than a communal monastery, providing a hermetic setting for prayer and meditation; its monk caretaker is appointed by the Trongsa monastic community, while the broader Tharpaling complex is under the Central Monastic Body ¹².

Other documented temples and monasteries. Visits and records cover Kyichu Lhakhang, Kurje Lhakhang, Jakar Lhakhang, Chakhar Lhakhang, Rimoche temple, Tamshing, Dramitse monastery, Kunzangdra (housing 18 students and teachers in a religious school), and Thangbi (housing 30 students in a gomchen-gi-dratsang, a lay-priest school), indicating a widespread typological repertoire; ancillary buildings identified within the monastery type include mani lhakhang (prayer halls), wang lhakhang (teaching halls), kandro lhakhang (female-deity chapels), zimchung (residential quarters), and hermitages (phug) ^14,9. White records the Ta-lo monastery: small, well-built two-storied houses with carved verandahs and painted fronts scattered in individual gardens, a large temple crowning the site, and (200 feet higher) the small, beautifully decorated private residence of the late Dharma Raja; the chapels at Ta-lo are scrupulously clean and possess glass window-panes, and the Norbugang temple contains miniature chotens or jewelled silver caskets housing the ashes of the Shabdung Rimpochi ³. A monastery built in the twelfth century by disciples of Gyalwa Lorepa was renovated by Chhogyel Minjur Tenpa (1646–?) and the Fourth Je Khenpo Damchoe Pekar (1697–1707), with a new temple to the east constructed by the 7th Je Khenpo Ngawang Thinley; as funeral rites for the first king, the Second King, Jigme Wangchuck, installed a hundred statues of the eleven-headed Avalokiteshvara, the only such set in Bhutan ³⁹.

5.2.9 Interior decoration and the goinkhang

The interior is conceived as a decorated chamber. At Punakha Dzong (founded 1527 in this account) the main chapel contains a large clay sculpture of the Buddha in the earth-touching attitude on a double-lotus throne, with walls lavishly covered in paintings (mostly late, except a few seventeenth-century rooms) depicting mandalas or the life stories of the Siddhas; the legends of Buddha’s life, important elsewhere in the Himalaya under Tsongkha-pa’s influence, are here conspicuously missing. At Simtokha the main chapel has ten figures of Arhats and Dhyani Bodhisattvas over two metres high flanking the gigantic Buddha, and a large wall-painting depicts the Buddha in the Bhumisparsa mudra with Vajrapani and Vairocana—typical of the late period when every element was highly stylised and every corner crammed with figures and symbols ³⁷.

The Goinkhangs (goenkhang) are small dark rooms in lonely corners of monasteries, hung with skins, teeth, and nails of animals, and the remains of sacrificial victims or enemies together with their weapons, armour, and other objects erected as effigies, dressed in original clothes, the skulls usually covered with masks; in them are extraordinary paintings of demons, black magicians, witches, ferocious animals, vultures, and other inhabitants of the demoniac world. The “wheel of existence” is depicted as a circle held by Mara, lord of death, in his teeth and limbs, the rim divided into twelve inset pictures of the twelve-fold causal nexus, with a cock, snake, and pig at the centre representing passion, anger, and ignorance, and six segments contrasting happier and woeful spheres of rebirth ³⁷. At Dechenphug, the utse tower contains sanctuaries on its upper floors: the second houses the gongkhang dedicated to protective deities of the Drukpa school (particularly Mahakala, Yeshe Gongpo), the third the Sangay lhakhang (Buddha sanctuary), lit by ornamental window frames (rabsey) with copper-faced doors, their walls decorated with repetitive friezes and polychromatic ornament; weapons (swords and firearms) and shields taken from Tibetan armies are displayed, expressing the martial aspect of the protective deities, and the tower’s exterior is painted ochre-red, announcing the warrior character of the sanctuary within ¹¹.

Stone was mostly used in carving bas-reliefs for the outer walls of chortens and monasteries, generally depicting portraits of the Siddhas; Putalokhi, a fine bas-relief in black slate at the Thimphu Dzong, is inscribed “Putalokhi 34”—the number probably referring to the Siddha’s position in the hierarchy—and possibly represents Pu-ta-li, another name for the Siddha Nagabodhi ³⁷.

5.2.10 Temples and monasteries as living, vulnerable structures

The temple and monastery type is functionally alive and continually modified. The survey documented structural damage, timber decay, roof failures, and mural-painting deterioration across temples and monasteries, and noted that Tamshing’s owners plan to expand the daily worship room as the community grows, although such expansion would disrupt the structural integrity and destroy pristine murals ⁹. The temple and monastery types are distinguished by scale and institutional complexity but share the organizational logic of a central chapel surrounded by supporting spaces ⁹.

5.3 The chorten (stupa) and votive structures

The chorten and its related votive structures—prayer (mani) walls, prayer wheels, and wayside shrines—form a category of memorial and devotional architecture distributed throughout the settled landscape. The chorten is the architectural embodiment of the omniscient spirit—or Mind—of the Buddha. It is erected in memory of an eminent lama or to ward off evil spirits from places normally considered dangerous, such as crossroads, bridges, and mountain passes ^26,21. Chortens are found throughout Bhutan and represent a traditional architectural form influenced by an Asian tradition stretching from Tibet to Japan; they embody the architectural principles characteristic of Bhutanese building—straight lines predominate, and walls tend to taper and slope inward toward the top—participating in the broader formal language while serving distinct religious and memorial functions ⁴⁰.

5.3.1 Symbolism and consecration

Like statues, chortens are consecrated and contain a “tree of life” (arbre de vie)—a piece of wood inscribed with prayers or religious formulas. Statues, religious texts, fragrant herbs, and even weapons are placed inside them, and the violation of a chorten to steal relics is considered a major crime ^26,21,27. The chorten is composed of five parts symbolizing the five elements: the base (earth), the dome (water), the thirteen parasols (fire), the moon and sun (air), and the flaming pinnacle (ether); the thirteen parasols also symbolize the thirteen degrees to be ascended to reach Enlightenment. Some chortens are solid, while others are built as gates or contain interior chapels, as at Dungtsé in Paro, the Memorial Chorten in Thimphu, and the Yuley Namgyal Chorten at Punakha ²⁶.

5.3.2 The three stylistic types

Three distinct stylistic types of chorten exist in Bhutan ^26,21,27:

• Large chortens of whitewashed stone, built on the model of the Bodnath chorten in Nepal, exemplified by Chendebji and Chorten Kora ²⁶.
• Modest (smaller) stone chortens with strong affinity to the classical Tibetan style, found particularly in central and eastern Bhutan, often protected by a wooden superstructure ^26,21.
• Chortens with a square structure and four-sided (four-sloped) stone-slab roof, with a broad red band ornament just below the roof, found primarily in western Bhutan and recalling the chortens of the Kham (Derge) region in eastern Tibet ^26,21.

At Chhuzom, where the roads from Ha, Paro, Thimphu, and Phuntsholing meet, three chortens stand on the left bank of the Paro River at its confluence with the Thimphu River, protecting the site from evil spirits; built at different times, they reflect the three styles found in Bhutan—Nepalese, Tibetan, and Bhutanese—the Bhutanese chorten having been built at the beginning of the 1980s ³⁸.

5.3.3 The chorten as three-dimensional mandala: Thangtong Gyalpo’s work

Thangtong Gyalpo’s architectural work in Bhutan included the construction of chortens as integral to his mission of spreading Buddhist teaching and subduing harmful geomantic forces; he built a number of chortens on geomantic principles ^35,14. The Dungtsi Lhakhang in the Paro valley exemplifies his approach: encountering a place occupied by an evil demon responsible for misfortune, illness, and famine, he subdued the demon through supernatural powers and built a chorten above the cave entrance ³⁵.

The Dungtsi Lhakhang represents a sophisticated integration of chorten form with functional religious space, combining chorten and lhakhang functions in a unified structure that embodies Buddhist cosmology as a three-dimensional mandala: the square ground floor symbolizes earth; the cylindrical bumpa (rotunda) represents water; the rising tower with thirteen rings signifies fire; the recumbent sickle with solar circle denotes air; and the flaming drop at the pinnacle represents ether, while a central column descending through all floors represents Meru, the axis mundi ³⁵. Unlike a conventional chorten, its bumpa is divided into two floors rather than remaining hollow; equipped with internal circumambulation paths (korlam) and four niches at the cardinal points, it creates a ritual space guiding devotional practice. The concept of the divided bumpa appears in other major Kumbum chortens—at Jonang and Gyang Bumoche in Tibet—suggesting a deliberate architectural lineage. The structure functions as a three-dimensional teaching device: the ground floor represents the life of laypeople, monks, and saints; the basement of the bumpa allegorizes the Bardo (the intermediate state between death and rebirth); and the upper bumpa floor displays Yidams with their consorts in Yab Yum position. Circumambulation, beginning clockwise from the left, activates 108 prayer wheels fixed to the temple walls while introducing devotees to the complete pantheon of Drukpa Kagyu deities through murals arranged systematically at each cardinal direction and level ³⁵.

The Chung Riwoche Kumbum Chorten, constructed between 1449 and 1456 in the Latö region west of Lhatse, represents Thangtong Gyalpo’s mature architectural synthesis: a nine-story structure with eighty-four chapels (including the ground floor), employing the divided-bumpa system inherited from Jonang and Dungtsi Lhakhang. The base floor contains a korlam; four upper floors each contain twenty chapels; the bumpa divides into two floors with korlam; and four small temple niches occupy the roof construction ^35,36. Unlike the Gyantse Kumbum, which features large sculptural figures in cardinal niches, Chung Riwoche employs painted decoration throughout, with equally sized temple niches at every floor; the paintings exhibit the Latö school style—squat, athletic figures with thick black edge lines—contrasting with the more elegant Nepali and Chinese influences at Gyantse ^35,36. The construction process, documented by the biographer Gyurme Dechen, reveals integration into regional patronage networks: local rulers supplied craftsmen, wood, and workers, while the master and disciples participated directly in earthwork and stonework. The biography records three collapses during construction to the bumpa level, which Thangtong Gyalpo interpreted as signs of impermanence requiring patient continuation rather than abandonment; the structure was completed in 1456, when he was ninety-six, with formal consecration rites performed by the master ³⁵. The kumbum stands approximately 250 metres from the Chung Riwoche Chakzam iron chain bridge, which Thangtong Gyalpo constructed to secure access to the shrine for pilgrims, particularly when ferry traffic was not possible ³⁶.

5.3.4 Documented chortens

White records chortens (chutens) throughout Bhutanese settlements as votive and commemorative structures integrated into the architectural landscape: at Poonakha, a choten at the junction of two valleys commands a view of the castle; at Angdu-phodang, a large choten occupies the well-paved flat before the main entrance, accompanied by a masonry tank and seats; a fine choten built in imitation of the Swayambunath in Nepal stands on a tongue of land at the junction of two mountain torrents; at Tongsa, a fine square choten stands on the ridge behind the castle. Chortens also serve as commemorative structures (the jewelled silver caskets at Ta-lo holding the ashes of the Shabdung Rimpochi) and as decorative elements scattered across monastic settlements (the row of white chotens surmounting the dividing wall at Tashi-cho-jong, protected by a double roof, and the decorated chotens breaking the monotony of houses across the Ta-lo hillside). The chorten thus functions simultaneously as votive monument, commemorative marker, and architectural ornament, integrated into both fortress complexes and monastic settlements ³. White’s photographic record likewise includes chortens (Chutens) as a distinct architectural type alongside dzongs, monasteries, and domestic structures ⁸.

The chorten functions as a receptacle of offerings and a reliquary, recorded as a significant monument requiring conservation attention; the inventory includes Chorten Kora, documented through photographic survey ⁵. The survey documents two principal sites ^14,9:

• Chendebji chorten (Tongsa district), built in the eighteenth century, well maintained and rebuilt in 1966, following the design of the Charungkhashor chorten in Nepal ^9,14.
• Chörten Kora (Tashiyangtse / Tashigang district), built on a small alluvial fan on the left bank of the Kulong-chu river at an altitude of 1,880 metres, not far from the dzong of Tashiyangtse, with the design of the Charungkhashor (Charungkhashor of Nepal) chorten; in winter, pilgrims from all over Eastern Bhutan and from Tawang in Arunachal Pradesh come to visit the shrine ^14,9.

Chörten Kora is in danger of destruction through erosion of the river bank to its west, exacerbated by water from the Bersam-chu stream that percolates through the courtyard. A masonry wall about 150 metres long was built in response, but erosion continued and undermined the wall along its full length; a gabion (meshed wire and boulders) added in 1988 proved insufficient, especially after heavy monsoon rains, and the survey recommended a comprehensive drainage system and strategic placement of gabions to divert water toward the right bank—its preservation requiring active management of water flow and embankment protection rather than structural repair. The chorten type here has a courtyard and ancillary buildings, and local people plan to expand the temple to the south and build facilities for pilgrims ^14,9. Other recorded chortens include the Chendebji chörten in Tonga (Tongsa) District and the Kuri chörten in Lhuntsi, indicating a distributed typology of votive structures ¹⁴.

5.3.5 Mani walls (prayer walls / Mani Dangrim)

Stone inscriptions on prayer walls, or Mani Dangrim, constitute a significant category of votive structure. These monuments merge in form and purpose with the chorten, and in most instances the two types are found together: two chortens may be linked together by a stone wall, a “mani wall,” named after the mantra of the bodhisattva Avalokiteshvara most often inscribed on the stones—the mantras of two other great bodhisattvas, Vajrapani and Manjushri, are also seen; such stone walls are relatively few in number and fairly short in Bhutan ^21,27,46. The prayer walls are quasi-religious structures generally sponsored by a local ruler or other village governing body, containing written prayers exhorting people to moral behaviour, or at minimum the six-syllable Mani prayer and other power mantras repeated many times ⁴⁶.

The Mani Dangrim is an architectural form having roots in the Buddhist chhorten traditions common to Bhutan, Tibet, and other nearby Buddhist countries. A comparative example near Gami in Mustang (along the Tibetan border of northwestern Nepal) contains inscriptions reciting episodes from local history and functions as a territorial marker with temporal and political significance, marking the borders of principalities within the kingdom of Lo ⁴⁶. In Bhutan, a surprising number of Mani Dangrim of all shapes and sizes have survived from centuries past, lining the old public by-ways in both east and west, sometimes in hidden places along near-forgotten tracks; they were clearly meant to be touched and read by passers-by. The earliest known examples come from eastern Bhutan, including a small prayer wall at the ruined village site of Jamkhar near Trashigang, associated with the legendary ninth-century refugee prince Lhase Tsangma. Prayer walls from the seventeenth century and later begin to contain more historical information—the names of people, rulers, and clues to the date of creation; a well-preserved seventeenth-century example from Ura village records that it was created at the behest of the Penlop Mingyur Tenpa and funded by the local ruler of Ura, and includes the names of the artisans who carved the inscription and built the structure as an act of religious piety ⁴⁶. The Mani wall is altogether a form of public work and a medium of communication, created by local communities to cement the social fabric and to articulate a common dedication to the principles of Buddhism—a kind of public message board communicating an essentially Buddhist theme of mindfulness, devotion, and community spirit ⁴⁶.

5.3.6 The prayer wheel

Davis documents the prayer-wheel as a votive structure integral to the religious landscape. A whirligig or barrel is set upright to turn on a spindle, the inside filled with a roll of paper printed all over with the word om mani padme hum; fixed in a recess against either of the wayside shrine buildings, with a hole to admit the hand, it may be twirled by every devout passer-by. So highly is it regarded that at the entrance of some castles such devices are fixed in frames finely ornamented and gilt ¹⁶. At Wangdu Phodrang one had a crank to the spindle, and a man sat every morning keeping it constantly turning while he repeated the word; sometimes three larger barrels are enclosed in a small building erected purposely for them, kept continually in motion by spindles passed through the floor and fixed to a water-wheel below ¹⁶.

(Prayer wheels also feature among the minor wayside and ancillary structures discussed in §5.6, and the circumambulatory prayer-wheel rows at Talo monastery and Dungtse Lhakhang are noted in §5.2 and §5.3.3.)

5.4 The palace, manor, and elite residence

The palace and lordly manor form a distinct residential type derived from, but distinguished from, the dzong. Whereas the dzong combined religious and temporal functions for defence, the elite residence adapts the fortress’s formal organization to secular and domestic life, reducing defensive severity and increasing fenestration and ornamental elaboration.

5.4.1 Elite residence within the dzong

The earliest documentation of elite residential architecture comes from Davis’s account of Tashichö Dzong (1783). The central structure of the dzong—more lofty and ornamented than the rest—houses the Rajah and some of his principal people; the apartments are spacious and as well proportioned as any in Europe, arranged in three stories communicating by handsome verandas continued round the inside of the building, with a passage from the middle story to the Rajah’s apartments in the centre ¹⁶. The Rajah’s sister was lodged in a part of the building appropriated to the mission. The Rajah is described pointing to images and pictures of deities adorning his room and as versed in Bhutanese medical practice ¹⁶. The architectural character of the elite residence is distinguished by large balconies projecting from the upper stories (capable of holding fifteen or twenty persons) and by the absence of windows below, as they would not contribute to the strength of the place; the ornamental programme includes painted flowers and dragons in the Chinese taste on pillars and walls, with bells suspended from the corners of the roof ¹⁶.

The palace’s apartments are lofty and of good size, with communication by handsome verandas; floors are of boards or of well-cemented pebbles, and walls are whitewashed with a stripe of red a little below the roof. The timber is chiefly fir, with beams and smaller parts joined by mortise and dovetail without pins of iron or wood ²⁰. The architectural treatment reflects the Rajah’s position: at home he appears without parade, and access is relatively informal—the only abject mark of subjection being the prostration used upon introduction after a considerable absence ²⁰.

Within dzongs, the Penlop’s residence occupies prominent positions: at Tongsa, a fine five-storied building on the north side of the court houses the Penlop when in residence, originally erected by Mi-gyur Namgyal, the first Deb, and rebuilt after the 1897 earthquake, with its two upper stories decorated by the Penlop of White’s time. The architectural treatment of elite spaces emphasizes fine decoration, carved and painted elements, and commanding siting within the fortress complex ³.

5.4.2 Wangdu Phodrang Dzong as a consecrated habitation

Wangdu Phodrang Dzong is documented as a consecrated habitation where the Deb Raja made a point of residing for part of every year. The fortress stands on the southern extremity of a wedge-shaped rocky hill, its sides washed by two rivers that join at the base; it is an irregular, lofty structure of stone covering the full breadth of the rock, with high solid walls and a single entrance in front, preceded by a large level space joined by an easy slope to the Punakha road. It is accompanied by a round tower on a high eminence, perforated with loopholes and supporting projecting balconies—a roomy lodgement commanding a position that screens the main castle from view at a small distance, the spatial relationship documented in Davis’s watercolours. The fortress is attributed to the Shabdrung (Ngawang Namgyel) and said to have been erected about one hundred and forty years before 1783; Wangdu Phodrang was selected for the principal residence of the Shabdrung for its superiority in both strength and beauty, though the site is subject to violent winds drawn up the deep dells ⁷.

5.4.3 The lordly manor (ngagtshang / seigneurial residence)

Lordly mansions, often called Ngagtshang (seigneurial residences, ngagtshang), seem to have appeared at the end of the nineteenth century, when the country began to enjoy relative peace and the lords of Bumthang acquired great political power; their construction continued during the reigns of the first and second kings ^26,21,27. Their basic layout is very similar to that of a fortress: the lord and his family lived in a central building surrounded by an enclosed courtyard with service buildings backed up against its walls. However, the architecture was less severe than that of dzongs, which were built for defence: there was considerably more decoration on the woodwork, and windows opened even from the exterior walls. The upper floor of the central building was always turned into a private chapel (choesham), decorated with painted murals and containing numerous statues and the religious books needed for rituals ^26,21,27. These residences demonstrate how the fortified dzong type was adapted for elite domestic use, retaining the courtyard-centred organization and timber-frame construction while reducing defensive severity and increasing fenestration and ornamental elaboration; the private chapel (choesham) as a dedicated upper-storey space is a consistent feature, expressing the integration of religious practice into the domestic realm ²⁶.

The most noted examples are Wangduchoeling, Domkhar, Prakhar (Prakar), and Ogyenchoeling (Ugyenchoeling) in the Bumthang region; Kunga Rabten, Enchoeling, and Samdrupchoeling to the south of Trongsa; and Gangtey (Gantey) in the Paro valley; the list of examples also includes Lamey Gompa ^21,27,26.

White documents elite residential architecture beyond the dzong: the private residence of the late Dharma Raja at Ta-lo (200 feet above the monastery) is a perfect little dwelling, charmingly arranged and full of fine painted frescoes and carved wooden pillars and canopies, the room where the late Lama died receiving ritual veneration—suggesting the architectural significance of elite death chambers. Dichen-phodang, the private residence of the Thimbu Jongpen near Tashi-cho-jong, is a fine building; the ex-Paro Penlop’s house is conspicuous for its cared-for appearance ³. White’s photographs of the Paro Penlop’s house, Tongsa’s house and courtyard, and the Tongsa Penlop’s sister’s house show structures using the same constructional system and formal language as other types but distinguished by scale, siting, and the elaboration of ornamental detail; the “Courtyard, Tongsa’s house” suggests a planned spatial organization around a central court, and the sites chosen are noted as excellent for habitation ⁸.

5.4.4 Wangdu Choling: the residential palace as a building type

Wangdu Choling (Wangdü Chöling) exemplifies the palace as a distinct architectural type. Built by Trongsa Pönlop Gongsar Jigme Namgyel in 1857 (also given as 1858), it represents a departure from the dual-purpose dzongs established by Zhabdrung Ngawang Namgyel, being designed exclusively for secular affairs and as a family residence—a specialized elite dwelling rather than a fortress-monastery ^47,48,49. Its architectural character demonstrates a masterful synthesis of formal languages, blending innovative features present in the dzongs with those of the manor houses, in sync with the lifestyle of the time; this hybrid approach creates a coherent domestic architecture suited to a high-ranking administrator and his household ^47,48.

Located in the Choekhor Valley of Bumthang at an altitude of 2,600 metres, the palace is inspired by the dzong but executed at a smaller, more domestic scale. The complex comprises a paved stone courtyard enclosed on all sides by two-storey buildings arranged in a rectangle—a configuration termed the shagkhor (”enclosure of living quarters”)—providing living quarters and storerooms around the perimeter. The central tower, or utse, rises four storeys and contains a storeroom, an apartment that served as the residence of Jigme Namgyal and his wife Pema Choki, and two temples. The fenestration distinguishes the palace from fortress architecture: windows are very narrow at the base but encompass the whole upper floors with light timber and lattices (a feature called rabsel), providing both security and habitability—light and air to the upper residential levels while maintaining defensive closure at ground level ⁴⁹. The Utse (central tower), personally constructed by Jigme Namgyel during his tenure as Trongsa Pönlop, retains its original structure and architectural character without modification, preserving the formal intentions of its builder and establishing the formal hierarchy of the composition ^47,48.

The palace complex integrates religious function within the domestic program, though subordinate to its primary secular purpose: the Utse Gönkhang houses the main tutelary deity and religious objects, and the Chakdzö Lhakhang functions as a treasure house dedicated to deities of wealth and prosperity; the Royal Family contributed religious objects over time, resulting in nine silver vases for butter-lamp offering in the lhakhangs ⁴⁷. Ancillary religious structures stand nearby: the Lingkana Temple, resembling a large house, stands about 100 metres to the north, built to serve the religious needs of a local population too poor to conduct rituals in their own houses; it is surrounded by prayer-wheels with engraved slates of deities behind them, and five water prayer-wheels (chukhor mani) stand below it, the first said to be as old as the palace itself and four others built in 1964–65 ⁴⁹.

The palace functioned as the first Royal Court of the Wangchuck Dynasty following the proclamation of Gongsar Ugyen Wangchuck as first Monarch in 1907, serving successive kings until the Third King Jigme Dorji Wangchuck relocated the Royal Court to Paro Ugän (Ugyen) Pelri Palace and subsequently to Thimphu Dechencholing ⁴⁷. The First King was born at Wangdu Choling in 1862, and the Third King grew up there absorbing lessons of statecraft and court procedure ^47,48,49. After Kunga Rabten Palace in Trongsa was completed in 1929, Wangdu Choling became the Summer Palace, occupied for six months of spring and summer before the move to the winter residence—a seasonal pattern reflecting Bumthang’s climate and the provision for dual residences in the elite domestic system ^47,48.

Renovation and extension occurred in phases: Jigme Namgyel undertook work during his brief retirement after 1866, and Gongsar Ugyen Wangchuck carried out further extensions ⁴⁷. During the reign of the Second King Jigme Wangchuck, a comprehensive reconstruction was planned (1950–51): orders were dispatched to the people of Mangde, Punakha, Haa, Kurtoe, and Trongsa, and approximately 300 master builders (garpas) responded, with Dasho Thinley Namgyal (the Queen’s half-brother and Zhemgang Dzongpon) overseeing the project; timber was extracted from the Chokor (Upper Choekhor) mountains and floated down the river. The Trongsa Abbot Dranglapa Dargye successfully pleaded that the central tower—the original work of Jigme Namgyal—should not be modified, though the rest was to be renovated; oral tradition records that the large windows (rabsel) of the central tower had become rotten and were remade. The reconstruction was never completed, as the Second King died in January 1952, preserving the original Utse as a record of Jigme Namgyel’s workmanship ^49,47. The palace had earlier been damaged by the great earthquake of 1897 ⁴⁹.

The palace exemplifies the principle that, through matrilineal inheritance and cross-cousin marriage customs particular to the Bumthang region, women held property while men held political titles and power: although associated with the Kings of Bhutan, Wangdu Choling never belonged de jure to the First, Second, or Third Kings, but to female members of the royal family. Following Pema Choki’s death in 1884, Ugyen Wangchuck followed matrilocal custom and moved to his wife’s residence, and Wangdu Choling and its estate passed to his sister Ashi Yeshe Chodron and her husband—an oral tradition recording that the shagkhor was built by Ashi Yeshe Chodron rather than by Jigme Namgyal. Ashi Pema Dechen, the Younger Queen Mother, remained at Wangdu Choling after the Third King moved to Ugyen Pelri Palace, residing there with her son Prince Namgyal Wangchuck and three princesses—Ashi Choki, Ashi Deki, and Ashi Pema—the ultimate dwellers and estate holders until they left for Thimphu in the early 1970s ⁴⁹. Wangdu Choling stands as the oldest structure built by the Wangchuck monarchs and represents a coherent architectural statement about elite residence in mid-nineteenth-century Bhutan ⁴⁸.

5.5 The farmhouse and vernacular dwelling

The farmhouse is the primary vernacular building type and demonstrates the coherence of the Bhutanese architectural tradition at the domestic scale ³⁰. The traditional house constitutes the most accessible category of vernacular architecture and is shaped by the same Asian architectural tradition that informs the dzong and chorten—straight lines predominating, with walls tapering and sloping inward toward the top ⁴⁰. Both the dzong and the farmhouse are constructed without nails or metal hinges, establishing a continuity of constructional technique across the typological repertoire from fortress to farmhouse ⁴⁰. As elsewhere, the temple is in effect an “overgrown house,” so that the farmhouse provides the constructional and spatial template from which the monumental types are elaborated (see §5.2.5) ^29,30.

5.5.1 The Tibetan-type house: defining characteristics

Four characteristics declare the Bhutanese house to be of the general Tibetan type: reliance on heavy, load-bearing walls; the multi-storey arrangement in which people live above their animals; the flat roof (in the Bhutanese case covered by an extra pitched roof) used for storage and as an extension of living space; and poor provision for heating—an internal hearth being the sole means of cooking, heating, and often lighting, its smoke finding its way out as best it can, in Bhutan by the windows ^29,30. Other notable features are the generous size of the house and rooms, the lack of furniture, and the evident pride and care taken in construction and decoration ^29,30. A Bhutanese house is an impressive and beautiful structure, its large, well-proportioned masses enlivened by the white-painted panels of the upper storey and the brightly painted window frames and mouldings ^29,30; the beauty of its proportions and decorations makes it one of the loveliest examples of vernacular (popular) architecture ^26,21,27. In its formal appearance the characteristic house of the inner-Himalayan zone is oddly reminiscent of Swiss chalets ³³.

5.5.2 Tripartite vertical organization

The functional organization is tripartite: the ground floor is used for domestic animals and storage; the middle floors accommodate the family’s living quarters; and the attic below the roof stores fodder and grain ^7,6. In central and inner Bhutan the typical dwelling is two to three storeys high, with several rooms, decorated sliding windows, and projecting wooden balconies; the vertical organization—livestock on the ground floor, living quarters and chapel on the first floor, storage attic above—reflects the integration of animal husbandry, domestic life, and spiritual practice within a single structure ²². In the inner-Himalayan zone the typical house is two storeys high with a large airy attic for produce storage; in rural areas the ground floor invariably functions as a cattle barn, the upper floor as living quarters, and one elaborately decorated room (the choesum) serves as a domestic chapel in most houses ^32,33.

The two surveyed houses in the central mountain valleys are free-standing structures with stables nearby and surrounding gardens and fields, though the 2003 government regulation banning animals from residential ground floors has fundamentally altered this traditional organization ²³. The Ura stone house is a three-storey structure of local stone with a prominent wooden rabsel facade: the ground floor historically held separate stables for cows, calves, and sheep, with the winter kitchen above for thermal benefit; the first floor contains storage rooms and the winter kitchen (guensa); the second floor houses the main kitchen (taptsang), sacred room (choesham), storage rooms, and the rabsel entrance hall; the roof space (khomsang) is for storage. The Eutsa rammed-earth house is a two-to-three-storey structure with rammed earth walls and natural stone foundations, of simpler construction: ground floor for stables and agricultural storage; first floor (bakhi) being renovated for rental space; second floor with the primary kitchen and living room, storage rooms, sacred room, and prominent rabsel; the roof floor (chimthog), reachable only by ladder, used for storage. Both employ the characteristic three-tier organization, with the rabsel as the dominant feature, consistently oriented toward the valley ²³.

5.5.3 Construction: rammed earth, stone, and timber

The Bhutanese farmhouse is constructed on the same lines throughout western Bhutan and apparently in the east as well ²⁹. The main walls are about three feet thick at the base, resting on stone foundations, and taper slightly upwards; they are made of rammed earth, known as gyang in Tibetan ^29,30. Construction is a communal undertaking: two lines of planks are set on edge on the foundations and held by wooden bars, and teams of women and girls pour earth between them and ram it hard with long rammers to the rhythm of special songs; after some hours' pounding and singing, the planks are raised to rest on pegs driven into the completed layer, and the next layer of two to three feet is pounded. The junctions between layers and the peg-holes can usually be seen on the finished building, helping break up the large expanses of blank, light brown wall ^29,30. Meanwhile the men hew and trim the timbers for floors, roof, and upper storeys with long straight knives and axes—huge tree trunks (usually the Bhutanese Pine, apparently the Blue Pine of Kashmir) transformed into square-sectioned timbers and floor-planks by what is essentially carving, rather wasteful of wood, which is fortunately plentiful ³⁰.

The traditional farmhouse was a three-storey rammed earth structure, rectangular in plan, measuring on average forty by forty-five feet on the longer side and thirty by thirty-five feet on the shorter; though erected on rectangular foundations, cornice projections at the front created a visually square appearance, since houses were rarely actually square—that form being reserved for temple construction ³¹. The structural system employed three parallel rammed-mud walls running lengthwise to support beam loads on both sides; wooden façades rose only on the front elevation of the second and third floors, while interior and rear mud walls extended continuously from first to third storey; the walls typically measured thirty-six inches thick, later reduced to twenty-four inches to preserve internal space ³¹.

Regional and material variants exist. At Murichom, houses are built of stone with clay as cement, of square form, with walls narrowing from foundation to top; the roof is supported clear of the wall, has a very low pitch, and is composed of fir boards on cross beams and joists confined by large stones; the lower part holds hogs, cows, and other animals, and the family occupies the first story, reached by a ladder made of one half of a split fir tree with rude holes cut as steps ⁶. In southern Bhutan, dwellings are rectangular with timber walling or major walls of piled stone with mud mortar, generally built on high land for protection against wild animals and floods; in Nepalese-settlement areas, outer walls are mud-plastered and painted with earth-colour, and the isolated poor practise shifting “Jhum” cultivation, implying more temporary or mobile building forms ²². The style varies by location and elevation: thatched bamboo houses predominate at lower altitudes in the south, while at very high altitudes most dwellings are simple stone structures or yak-hair tents ³³. Rural houses are rectangular, with one or two storeys; the upper floors are constructed almost universally as an open wooden framework with bamboo lathing filling the spaces, covered by white plaster ^26,21,27. The upper storeys are almost entirely a timber frame with bamboo lattis infill covered in whitewashed render; traditionally the timber armature and render were left exposed, but the tendency now is to paint and decorate them ²⁶.

5.5.4 The upper storey, windows, and the rabsel

The outer walls of the guest room and much of the main living room are made not of rammed earth but of a framework of wood, jutting slightly outwards and filled with thin wooden panels broken by narrow window-lights with trefoil-shaped tops, closable by sliding wooden shutters on the inside; the rest of the walls on this floor are continuations of the rammed-earth walls below ^29,30. Windows traditionally had no permanent protective screening; sometimes bamboo screens were put up to shut out bad weather without excluding light, but today glass is widely used, and at night windows are closed from inside by sliding shutters ^26,21,27. The windows and balconies increase in size and ornamental elaboration on higher floors, creating a visual effect of lightness and proportion against the massive walls ²⁴. Windows and doors were prefabricated as timber-framed assemblies (rab gsal, panelled façades) before installation; wide windows with panel shutters lacked locks, glass panes, and iron mesh, serving for ventilation and light—and becoming notorious as passages for courtship activities, where young men attempting to enter were met with cold water, ash, or blows from young women inside ³¹. The arced window topped with wooden cornices, and the projecting wooden cornices themselves—called bog/langlha or ngangpa (”nose of the ox” and “neck of the swan”)—were among the most wood- and labour-intensive elements of the façade, shaped as a series of ox noses upon which were stacked swan necks, giving definition to the Bhutanese façade; they were fashioned with dagger and axe rather than saws, which were not in common use before the 1970s ³¹. The distinctive arched window panelled façade on the second floor and above gave architectural continuity across economic classes and regions ²⁵.

5.5.5 The roof

The roof is perhaps the most striking feature from afar and structurally the most interesting part of the whole building. On the flat top of the main body of the house, four trusses of heavy timbers rest, held together solely by the ingenious way their vertical and horizontal members are slotted into one another, kept from falling sideways by rods running from one truss to the next; the surfaces of the pitched roof are covered with layers of thin wooden strips weighted with rows of stones, and the whole space so roofed forms an open-sided and open-ended loft for stacking firewood and fodder ^29,30. The pitched roof is added as an afterthought to a complete house with a normal flat roof, since the rainfall of Bhutan is far heavier than over most of Tibet proper ^29,30. The space between the flat ceiling and the pitched roof is used for drying vegetables or meat and storing hay; in towns it is enclosed with bamboo matting ^26,27,33; in winter the stored hay provides insulation ^32,33. Roofing employed overlapping fir shingles (zhar, shingleb), a set lasting about twelve years if turned after six, durability enhanced by chimney smoke rising through the attic ³¹.

5.5.6 Interior arrangement and the domestic chapel

Entry is gained by a ladder cut from a single piece of wood (with grooves serving as handrails) leading to a platform of bamboo rods laid on the projecting ground-floor ceiling joists; a doorway leads into the windowless first floor, whose rooms store grain, beer, and other produce, and another ladder leads up through a trapdoor to the top storey, the living quarters proper ^29,30,32. The living quarters are surprisingly spacious, with ample room for a married couple and their children (and guests). The main living-room has a hearth for cooking, a few carpets and low cupboards, and utensils hanging from the walls; the family eats the evening meal around the hearth, the main inconvenience being clouds of smoke filling the soot-encrusted room. A small guest room adjoins, separated by a framework of pillars supporting the main roof beam, through which one can look to the chapel on the other side ^29,30.

The top floor is divided into small rooms without specialized uses except for the latrines (if any), the kitchen (smoky and blackened by soot, as chimneys did not exist), and the little private chapel (choesham), which doubles as a bedroom for distinguished guests and lamas ^26,21,27. The choesham (choesum) is a fixed element on the upper floor, equipped with altar, deity shrine, and ritual objects ²³; storage rooms (phomna, nangmai, parang, rum) are distributed throughout, reflecting the importance of grain and food preservation in the mountain economy ²³. Furnishings were rudimentary: small low tables, mattresses rolled up by day with the bedcovers, rugs, shelves for dishes, metal or wooden trunks for clothes, a wooden altar in the chapel, and one or two looms for weaving ^26,21,27. The house opens onto a courtyard (sometimes covered) forming a terrace where many daily activities take place ^26,21,27.

A more detailed account of the well-to-do three-storey house describes the ground floor housing livestock—pigs and calves kept at night for safety and warmth in dark, cavernous spaces—with cattle and pigs fed in troughs in a courtyard within a compound wall ³¹. The second and third floors contained about six rooms each; a shrine room (namdag gosum, “three-doorways of purity”) occupied a prominent position, its doorways marking a segregative boundary not crossed by servants and serfs, and in well-to-do houses also separating kitchen from living room; among elite households (perhaps one in fifty) serfs performed kitchen chores within the kitchen boundary, with dishes handed over the threshold rather than carried across it ³¹. The kitchen occupied a central position on the middle floor of three-storey houses, with a large square chimney rising through the attic; no conduit connected the chimney to the mud stove, so smoke leaked throughout the attic, serving to speed-dry and dehumidify foods, vegetables, and craft-woods—a bamboo sieve-platform beneath the chimney allowing heat and smoke to pass through for these preservation purposes ³¹.

5.5.7 Decoration, symbolism, and protective devices

Carving plays an important part in Bhutanese domestic architecture: nonreligious designs and representations are found carved and painted on the front of many traditional houses, indicating that ornament and image are integral to the vernacular tradition, not confined to elite or religious structures ⁴⁰. A single large, ornate door often serves as the only entrance, emphasizing what the architectural language expresses as the mystique of secrecy and forbidden interiors ⁴⁰. Decoration follows a consistent iconographic programme: wooden surfaces are painted with designs of special significance—swastikas, floral patterns representing the lotus, cloud whirls, and the tashi tagye (eight auspicious symbols); larger paintings beside the front door often depict mythical animals such as the garuda or large red phalluses ³². The phallic symbols (mikha) hanging below the eaves are a standard feature, their stated purpose to ward off malicious gossip ^6,7; the phallus, associated with Lama Drukpa Kunley, is believed to ward off evil and is hung at the four corners or over the door, often carved in wood and crossed by a sword ^32,33. A prayer flag called a goendhar is erected at the centre of the roof of all Buddhist homes ³².

The ridge of an ordinary house was decked with a white banner, while the ridge of a rich temple’s roof was adorned with a metal pinnacle painted with gold or imitation gold; depending on the local mountain deity and associated conifer forest, a young tree of fir, spruce, or juniper was hoisted on the roof along with a bamboo shaft in an annual ritual, pulled directly up over the walls to avoid contamination and arriving defoliated and windswept, resembling a lightning rod from a distance ^25,31.

5.5.8 Siting, settlement, and the social meaning of the house

Houses cluster together in village settlements due to limited agricultural land and water supply in the vicinity, creating a settlement morphology of dense rural clusters ²²; they are oriented to the undulation of the land, with a tendency toward commanding hillsides above cultivated fields, and individual houses and plots are protected by stone-and-mud-fenced walls ²². The house stands together with a few others in a small hamlet just above the rice-fields that occupy the lower slopes and floor of the valley, with thick jungle (a source of firewood and fodder leaves) covering the slopes above—though over most of the inhabited area the jungle is replaced by scrubland or pine forest ^30,29. The pattern of habitation often consists of dispersed farmhouse groups of substantial prosperity, with large, well-maintained homes scattered through the valleys; these family-scale farm houses are dispersed among the cultivated fields ²⁴. White likewise records houses scattered individually in gardens across the hillside (as at Ta-lo) rather than in dense nucleated settlements, characterizing Bhutanese rural morphology, with rest-houses at major stopping points (such as Tashiling) forming a network of waystation architecture supporting travel and administration ³.

Houses were clustered in villages, standing side by side or back-to-back, nearness indicating distant blood ties; when rebuilt, houses moved only short distances from the original site, constrained by the labour cost of shifting stones until the advent of vehicles, with large spaces preserved around houses for footpaths and vegetable plots ³¹. Footpaths and trails were inviolable—an old saying held that the path of human beings and the path of corpses should not be blocked—and the community would rise against anyone who encroached on a footpath ³¹. Every house commanded an unobstructed view of both the high horizon and the flooding of light through trees, serving practical purposes of good wind flow and a high vantage point for monitoring livestock and fields; peach trees and willows fringed the houses (with oranges, bananas, and ficus nemoralis / oomshing in subtropical regions), the trunks of old willows bone-smooth from tethering cattle ³¹. The base of a peach tree often sheltered a mini-house for an earth deity, propitiated with offerings of popped white wheat or rice and milk; peach trees were also valued for the almond-shaped kernels pounded into a butter-substitute for butter-tea ³¹.

The main door typically faced southeast or east, never north—a Chinese-derived principle reflecting historical vulnerability to attacks from that direction ³¹. A well-to-do house was surrounded by large compound walls with an oversized wooden door-gate (rgyal sgo, “kingly gate”) wide enough for beasts of burden to enter with back-loads, with stables and pens adjoining the compound wall in addition to ground-floor corralling ^31,25. In wealthy houses the number of pigs could reach fifteen; two pigs were necessarily slaughtered annually—the chang phagpa (during rice-field flooding when work was intense) and the chogu phagpa (in the post-harvest month, to invite kith and kin and honour the protector deity)—while in eastern Bhutan, where high altitude favoured millet over rice, pork steak was usual during transplanting (households unable to afford pork substituting kow sha, roasted dressed hide) ²⁵. Pig fattening began a year earlier on a consommé of rice husks, grits, and grain by-products, with usual feed of boiled nettle leaves, taro, and cannabis leaves; three days before the annual chogu ritual a pig was slaughtered—bludgeoned or speared—and fermented grain was stuffed in its mouth to prevent lu (spirits of the subterranean world) from possessing it ²⁵. The second-floor balcony (sathe) was handy for drying cereals and vegetables and storing surplus; rooms attached to the compound walls or on the second floor were allocated to serfs ²⁵. The typical two-storey structure of farmers in subtropical areas had a floor area of 600 to 900 square feet excluding the spacious attic ²⁵.

Houses were known by the prefix “mothers' houses” (ma khyim) in addition to unique proper names, reflecting an inheritance practice in which a chosen daughter inherited the house and most land and livestock, while others received small subsistence shares such as food-fields (lto zhing); the mother served as the main householder, the husband orbiting the house to perform outdoor work and travels. A proper name was essential in a society without family names, and a historical search for a person was based on village name followed by mother’s house name. This matriarchal inheritance pattern was the norm except in the border regions of the Tshangla-speaking communities of Dungsam, where sons received precedence ³¹.

5.5.9 Modernization, regulation, and structural vulnerability

Both surveyed houses show evidence of recent modernization: replacement of traditional clay stoves (thab) with modern steel stoves (bukhar or me rtsa), addition of balconies, and conversion of former animal stables to storage or rental space. The 2003 regulation banning ground-floor animal husbandry has created underutilized ground floors in many houses, as these spaces with small windows and low ceilings are unsuitable for residential purposes ²³. Seasonal occupation persists in some valleys: the Eutsa house is inhabited from February to September, the family’s primary residence being in the winter village of Shangawang, a migration pattern characteristic of Phobjikha Valley settlements where most houses serve as temporary growing-season residences; rural–urban migration and reliance on remittances are also typical ²³. In towns, houses follow the same disposition but the ground floor has windows and contains kitchen, storage, and servants' rooms, and may house small shops, with kitchen and bathroom sometimes in a small annex at the rear ^26,21,27. Bhutanese long-drop toilets hang off the side of the upper storey of old houses, a practical if precarious solution to sanitation on steep hillsides ³³. Concrete has now appeared everywhere—painting it “in the Bhutanese style” cannot mask its ugliness—and since the beginning of the new millennium a fashion for large glazed bays and verandas (atriums), poorly adapted to the Bhutanese climate, has emerged ^26,21.

The vernacular farmhouse, while embodying a coherent constructional system, exhibits systematic structural vulnerabilities arising from non-engineered practice and the absence of standardized design guidance. A survey of seven rammed earth buildings in Wangchang Gewog, Paro Dzongkhag, documented a consistent system of rammed earth walls, timber floor joists and bearers, and timber roof trusses, but found no regular spacing or span for joists and bearers; the roof trusses are simply supported on the attic floor with weak connections between rafter and tie beam and between purlin and rafter, and no connection between roof support and floor or wall, leaving roofs vulnerable to wind damage. Characteristic defects include vertical cracks at corners, corner cracks at wall intersections, lintel cracks over openings, horizontal cracks at wall lifts, and damage originating from putlog holes, with wall delamination from weathering and rainfall erosion common ³⁴.

5.5.10 Continuity of craft and the social context of building

The conservation project at Buli Monastery illustrates the continuity of vernacular building knowledge: a team of seven local carpenters from Gyatsa village, headed by Mr. Jobthong (knowledgeable in traditional techniques), worked alongside the consultant’s head carpenter, Mr. Nil Kumar Sheresta, an expert in conservation of historic timber structures. The stone wall constructed around the ground-floor Kachens some forty years earlier had been built by local carpenters headed by Zow Gembo of Gyatsa, showing how vernacular builders responded to structural problems through traditional means, and a workshop established behind the monastery for repair of the Rabsel components indicates the spatial organization of craft work ¹³. White’s photographic inventory likewise systematically records villages and domestic structures alongside monumental types, indicating that vernacular dwellings employ the same basic constructional system and formal language as elite residences, adapted to the resources and requirements of rural households ⁸.

Davis provides limited direct description of the peasant dwelling but establishes its social context: the cultivators, the third class of inhabitants, enjoy the comforts of domestic society; the common people make a small domestic altar near the house—a pile of stones about three feet high before which they lay leaves, fruits, or blades of corn; and, there being neither wheel-carriages nor draught cattle for transport, the whole business of carriage is performed on the backs of the human species, with women the general drudges ¹⁶. A spacious house near the palace at Tassisudon, accommodating the embassy, was entered by a door on the south side into a square courtyard confining cattle; the upper story held a good suite of rooms, boarded and divided by doors turning on pivots, with a commodious balcony on the eastern front commanding a view of much of the valley, the house clean and commodious and forming with adjoining buildings a square courtyard with stabling for horses and lodging for servants ⁶. The houses recorded in Davis’s wash-drawings of the Thinphu valley (1783) are noted as not much inferior in quality to the dwelling-house of a village chief, suggesting a degree of standardization across social strata, their situation described as highly romantic ⁷. The farmhouses are composed of earthen walls and untreated wooden members weathered to a rich dark brown, carefully built and handsomely decorated, with spacious interiors and a sloping wooden roof providing protection and storage for fuel and fodder ²⁴.

5.5.11 Architectural origins

The rammed-earth construction is common throughout eastern and southeastern Tibet, and the peculiar pitched roof is seen in parts of the Gyarong area of eastern Tibet; the origin of this roof may lie outside Tibet altogether, to the east. The slotting together of horizontal and vertical timbers is common in Chinese roofs of all ages (though in China proper a complex bracketing system usually supports such a roof), and the first people to develop these roofs may have been early non-Chinese groups in what is now southern and western China; the wood-framed walls of the upper storeys may also owe something to Chinese carpentry. The trefoil-shaped windows, on the other hand, must ultimately be borrowed from India, presumably via Tibet, being well known in Nepal and parts of India ³⁰.

5.6 Minor and ancillary structures

Beyond the major monumental and residential types, the architectural repertoire extends to a range of minor and ancillary structures—wayside shrines, gateway chötens, water mills, village gateways, traditional bridges, and the service buildings of monastic complexes. The monument inventory of Bhutan includes minor buildings of religious or social importance beyond the major dzongs, monasteries, and temples, such as gateways at the entrance of villages, water mills, and traditional bridges; the recorded figure of approximately two thousand historical and religious monuments does not include these minor structures, indicating that the full architectural repertoire extends beyond the major typological categories ⁵.

5.6.1 Wayside shrines, gateway chötens, and mani-walls

Wayside shrines in the form of mani-walls are placed at the meeting of two principal roads, at the base of remarkable mountains, and invariably at the entrance of every capital village. A typical gateway chöten stands behind the mani-wall, through which all travellers pass to obtain the blessings of the mandala on its ceiling. These buildings have one small doorway, which always remains closed; such is the inhabitants' respect for its contents that they constantly uncover their heads, and if on horseback, dismount and walk while passing by. On each of the three great roads leading to Tassisudon a very spacious chöten is found, and a similar building stands like a sentinel by the roadside on each approach toward every consecrated habitation, proportionate in its dimensions to the magnitude and importance of the edifice with which it is connected ⁶.

A building with a solid wall built to receive the red stripe—symbolical and never failing to adorn religious structures—bears inscriptions in a character appearing to be deva-nagri, conveying religious and moral instruction. It has niches in which idols are sometimes placed to be viewed through gratings, in a mode not dissimilar to what is observable in Roman Catholic countries, or the niche may contain a wheel whose barrel encloses a roll of paper printed all over with the sentence Om-ane-pee-meehon; travellers are expected as they pass to give the wheel a twirl ⁶. One described temple is of solid structure but enclosed in a building to defend it from the weather; erected on a level slip of alluvial land on the side of the river Thinchu about a mile below Tassisudon, it serves the adjacent villagers for devotion, with the idol viewed in a niche on the side of the vase-shaped temple, and high poles at the angles of the building carrying a strip of cloth printed in repetition from top to bottom with the devout sentence Om-ane-pee-mee-hon ⁶.

Davis similarly documents the wayside shrine as a distinct type: generally of square form, it has either pictures of the deity within to be viewed through gratings, or is of solid masonry with the same figures cut on slate in relief and fixed all round in a row near the top. At these places high poles are erected with a narrow stripe of cloth fastened like a flag, on which is written and repeated om mani padme hum; the same word, cut in relief on stone, is fixed in a row against a sort of wall frequently found near the little temples. These white-washed fabrics, with a broad stripe of red round the upper part, and their flags are picturesque and ornamental to the country ¹⁶. (Mani-walls, prayer wheels, and the broader category of votive structures are treated in detail in §5.3.)

5.6.2 Bridges

Traditional bridges are an important category of ancillary structure that integrates with the landscape and settlement pattern. The bridge at Tongsa dzong, washed away in the 1991 floods, is cited as an example of an ancillary structure integral to the settlement ⁵. White documents bridges as a significant category of architectural infrastructure, recording photographs of a “Bridge at Angduphodong,” a “Bridge above Duggye,” and a historical comparison of the same bridge as sketched by Turner 130 years earlier; these structures, while utilitarian, employ timber construction and demonstrate the application of structural and aesthetic principles to infrastructure, and the comparison with Turner’s historical sketch suggests continuity in bridge form and construction technique over a period of at least 130 years ⁸. (The iron-chain bridges of Thangtong Gyalpo, securing pilgrim access to shrines, are noted in §5.3.3, and the cantilever bridges giving access to dzongs at river confluences are noted in §5.1.)

5.6.3 Water mills and village gateways

Water mills and village gateways function as minor architectural elements that articulate the settlement hierarchy and provide functional and symbolic demarcation of community spaces ⁵.

5.6.4 Service and subsidiary buildings of monastic complexes

The Dechenphug monastery includes several ancillary structures that served essential functions within the monastic complex. A small timber structure on four posts, positioned between the utse tower and the Guru lhakhang, housed two cramped and somewhat unstable monastic cells; described as modest and temporary in character, it was demolished during the conservation project and replaced by a new service building ¹¹. The original service building, constructed around 1960, occupied the southeast corner of the court and contained a large kitchen and reception hall at court level, with a stable at a lower level accessible from outside the monastery; it was in poor condition, with pisé walls cracking at inadequate foundations and a partially dismantled, unmaintained roof allowing rain and snow to decay the floor ¹¹.

The new service building, reconstructed 1996–1999, was designed to provide more comfortable accommodation for resident and visiting monks. It comprises a kitchen, refectory, and meeting room at court level, with five monk’s cells at the lower level lit to the south; modern amenities were added, with toilets at each level supplied with running water from a captured stream. It was built by local masons and carpenters using traditional techniques and materials—stone walls in earth mortar—with concrete employed only to cap the lower level of the former kitchen, creating a buried storage chamber beneath the court extension; positioned south of its original location, it enlarged the court moderately ¹¹.

A small pavilion sheltered the sacred rock (the incarnation site of the Genyen Jagpa Melen) at the centre of the court. The original shelter was a simple assembly of planks under corrugated metal sheets, apparently satisfactory to pilgrims in its simplicity; during the conservation project it was replaced by a glazed pavilion designed according to strict classical carpentry canons and provided with a double roof. A prayer wheel, powered by a permanent stream, preceded the monastery entrance. These ancillary and minor structures, though functionally subordinate, were integral to the monastic operation, and their conservation or reconstruction was essential to the viability of the site ¹¹.

6 The Historical Development of Bhutanese Architecture

The typology of the previous section is essentially synchronic; this section sets it in time. Its task is to trace the historical development of Bhutanese architecture as a continuous tradition—one that begins as an extension of Tibetan religious building, acquires a distinctive classical idiom in the seventeenth century, and is carried, with remarkable formal continuity, to the threshold of the modern period. The narrative is chronological and rests throughout on the interplay of textual record, oral tradition, and the material evidence of the standing fabric, weighing how far surviving buildings confirm or complicate the dates and attributions of the written sources. It opens with origins: the dynastic-period temples of the eighth and ninth centuries, the cosmological “taming” scheme into which they were set, and the wider Tibetan cultural world from which the inheritance came (6.1). It then examines the pre-Zhabdrung period of castles, post-imperial towers, and lineage seats, when fortified architecture and centralized authority had not yet fused (6.2), before turning to the decisive moment of codification under Ngawang Namgyel, the Zhabdrung, when the standardized dzong plan and the master-builder tradition gave the classical idiom its enduring form (6.3). The later chapters follow the elaboration of that idiom through continuous renewal, restoration, and reconstruction after disaster (6.4), and finally its passage into the Wangchuck era, when the fortress-monastery yields to the royal residence and the first substantive departures of the modern period appear (6.5). The governing question is one of continuity and change: how a single architectural language could persist across more than a millennium, and where the pressures of modernity begin to alter it.

6.1 Origins: the early temples and the Tibetan architectural inheritance

Bhutanese architecture begins as an extension of Tibetan religious building south of the main Himalayan range. The earliest temples, the cosmological scheme into which they were placed, the material evidence of their making, and the broader cultural setting of Bhutanese building all point to a single inheritance transmitted from Tibet and adapted to local conditions.

6.1.1 The dynastic-period temples and the “taming” scheme

The earliest Buddhist temples in Bhutan are attributed to the period of the first diffusion of Buddhist doctrine in the eighth and ninth centuries, established under the patronage of the Tibetan dynastic rulers, particularly Srong-btsan sGam-po (Songtsen Gampo) and his successors ^2,1. Only two temples are directly attributed to this dynastic period south of the main Himalayan range: sKyer-chu lHa-khang (Kyichu) in the sPa-gro (Paro) valley and Byams-pa'i lHa-khang (Jampa) in the Chos-'khor (Bumthang) valley ².

These temples were placed within a geopolitical and religious scheme known as the mTha'-dul Yang-dul paradigm. The scheme, attributed to Srong-btsan sGam-po—though likely developed over successive reigns through the eighth century—set the temples within a cosmological and political framework that affirmed Tibetan expansion and the civilizing influence of Buddhism ¹. Its basic structure derives from the Chinese Five Zones of Control (fu) as described in the Yu Kung, adapted to Tibetan geographical and political circumstances ¹. The four Ru-gnon temples in central Tibet form a rough square, with the Bhutanese temples positioned in the outer zones representing the frontier marches—zones of barbarism requiring subjugation and civilization through Buddhist teaching ¹. Thus the scheme positioned the temples as instruments of Buddhist “taming” (the civilizing influence of Buddhism) across Tibet proper and its borderlands, extending Tibetan religious and political authority southward into what would become Bhutan ².

The same logic appears in the foundational narrative of Kyichu. According to Bhutanese tradition, the first temple at Kyichu was built by the Buddhist Tibetan king Songtsen Gampo in the seventh century ³⁸. The story recounts that a giant demoness lay across the whole area of Tibet and the Himalayas, preventing the spread of Buddhism; to overcome her, the king built 108 temples positioned on points of her body, of which 12 were built to precise plans ³⁸. Around AD 638 the Jokhang in Lhasa was built over her heart, while Kyichu was built on her left foot and belongs to a group of four temples categorized as “subjugating regions beyond the frontiers”—establishing the temple as an instrument of religious conquest and territorial Buddhicization ³⁸.

Several sources record the dynastic attribution while differing in detail. The UNESCO survey states that Jampa Lhakhang in Bumthang is said to have been built in the seventh century by Songtsen Gampo (r. c. 627–649), following a pattern also seen at Kyichu in Paro, and notes that Zhungner in the Chume valley is probably one of the oldest temples of Bhutan, also said to date from the seventh century; the survey provides no technical analysis of form or construction to confirm the attributions ⁹. A fuller account attributes the oldest extant temples—Jampa and Kyichu—to the 33rd emperor of the Pugyel dynasty, Songtsen Gampo (617–650), placing their construction in the sixth century (with the widest margin, between 641 and 650), ordered by Songtsen but inspired by Queen Gyaza Wencheng Kongjo ³⁹. According to the Royal Testament of Songtsen Gampo, two of thirteen temples commissioned by geomantic analysis were built in Bhutan: Paro Kyichu and Mon Bumthang Jampa; Kyichu houses a Buddha statue comparable to that of the Lhasa Jokhang, while Jampa contains a Maitreya statue of the period ³⁹.

Both temples exhibit the same design, and their layouts show a remarkable resemblance ³⁹. The main structure of Jampa Lhakhang, built in the seventh century, has come down largely intact; Kyichu suffered partial fire damage at one time, but its statues remained unharmed, while its temple and corridors were damaged, leading to rebuilding in 1832 ³⁹. These ancient temples are characterized by small windows, if present at all, which reduced interior exposure to light and so lengthened the life of natural-colour paintings; the ancient Khoma Lhakhang exemplifies this principle, and another strategy involved setting windows low enough to prevent light from shining directly onto painted surfaces ³⁹. Oral history claims that the Bajo temple on the bank of the Puna Tsangchu shared the antiquity of Jampa and Kyichu; small and rugged, fortified by unusually thick tapering walls, it was destroyed completely in the 1968 flood, its colossal Maitreya statue plunging into the river ³⁹.

6.1.2 Material evidence of the Tibetan transmission

The temple of dKon-mchog-gsum (Konchosum) in Bumthang, identified with the historical name rTse-lung, demonstrates several characteristics of antiquity: diminutive scale, a central image of Vairocana (typically a sign of early date), and associated votive objects ². A large bronze bell (cong) preserved there was cast in the latter half of the eighth century by foreign craftsmen employing T'ang-dynasty metalworking techniques, providing epigraphic evidence of Tibetan royal patronage and of direct Tibetan missionary activity south of the Himalayas during the period of dynastic rule ^1,2. Its dedicatory formula names a maker or overseer (cong-mkhan), possibly Li'u-stag or Li'u-stang, suggesting the involvement of foreign craftsmen, possibly of Chinese or Central Asian origin, employed by Tibetan royalty ¹. The bell’s form—side panels divided by vertical ribbing and an undulating lower edge—preserves the characteristic Tang casting type, which does not survive in China itself but is perpetuated in later Tibetan temple bells ².

The incorporation of pre-Buddhist megalithic elements into these early complexes indicates the adaptation of indigenous sacred sites to Buddhist purposes. Standing stones and stone pillars appear at dKon-mchog-gsum, gSum-phrang, Bya-dkar lHa-khang, and mNa'-sbis ¹. At dKon-mchog-gsum the stone pillar stands on a stepped plinth and is marked with an eight-petalled lotus motif, and at gSum-phrang a finely dressed stone pillar stands within the principal shrine room—the physical integration of “pagan” symbols into Buddhist temples reflecting the broader pattern of adaptation of pre-Buddhist beliefs and practices documented in written sources ².

The central images of these temples—predominantly Vairocana—reflect early Buddhist iconographic preference and are themselves a sign of antiquity ^1,2. Their solitary and diminutive character, their location at significant landscape features, and their association with local spirit cults and later treasure-discovery traditions indicate their function as focal points for the integration of Buddhist teaching with local religious practice and the sacralization of landscape ¹. Their survival, particularly in Bumthang, reflects the marked continuity in that province’s history and its relative isolation from the sectarian conflicts that transformed the western regions ². For the Bhutanese, these temples form the material link between the genesis of Bhutanese religious and political identity and the origins of Buddhism itself in the region, establishing a lineage of legitimacy that later developments would elaborate ².

6.1.3 Eighth-century sacred sites and the later transmitters of the inheritance

The temporal depth of Buddhist architecture in Bhutan is uneven. Chorten Nagpo in Merak is mentioned in the biographic-play of Gyalpo Drimed Kunden and is datable, by calculation of time elapsed since the Buddha’s parinirvana, to the sixth century; it was renovated in the nineteenth century ¹⁸. No temples in Bhutan, however, can be dated to the two-hundred-year interval between the sixth century and the eighth-century activities of Guru Rinpoche ¹⁸.

A large number of eighth-century temples associated with Guru Rinpoche and his contemporaries—King Khikha Rathoed, Yeshey Tshogyal, and Monmo Tashi Chidren—remain standing, though the structures have changed over time ¹⁸. These include Nabji temple (housing the Immortal Stone Pillar of Peace), Kurjey, Singye dzong, Taktshang, Konchosum, Zungye Gegyen, Tang Anu, Tang Trel Baizur, and the ruins of Gyalyonkhar of Gyalpo Khikha ¹⁸. Statues of Nampar Nangzed (Vairocana, the Great Illuminator, symbol of emptiness) are the principal figures in the Tang Anu, Zungye Gyengyen, and Tamshing Konchusom Lhakhangs; further east, Khinyel and Churtsel Lhakhangs were dedicated to Vairocana, the central statue of Churtsel—believed founded by Machig Dubai Gyelmo—being Vairocana ¹⁸. The connection of this cult to imperial authority is explicit: Trisong Detsen, who emphasized Vairocana worship, installed Vairocana statues at all three levels of Samye ¹⁸. Tang Rimochen, associated with Khando Yeshey Tshogyal, is a venerated site, though the structure is possibly a much later addition, and the meditation caves of Guru Rinpoche (Chudrak, Guru Phog above Wangdicholing, Shugdrak) and of Yeshey Tshogyal (at Taktshang, Singye Naringphug, and Sangwa Dadruk in Khoma) contain no rock paintings or murals from that period ¹⁸. The site and palace of King Hamray (remembered in oral history as King Harga), father of Monmo Tashi Chidren, was displaced by the construction of a Zangdo Pelri temple in the 1990s, and a large structure at Gyalyonkhar of King Khikha—confirmed by Longchen Ramjam in his poem—has been squeezed by neighbourhood growth, leaving only stone walls of unknown age on what appears to be an original foundation ¹⁸.

One site illustrates the typical development of these places from a sacred cave into a built monastery. Choedrak was blessed by Guru Rinpoche around 747 AD, when he is said to have visited riding a tigress and meditated there; the footprint and pugmarks of the tigress can be seen on the cliff to this day, marking the site as one of the four sacred Drak (cliff) temples of Guru Rinpoche ¹². The later visit of Gyalwa Lorepa (1187–1250), a chief disciple of Tsangpa Jarey and a master of the Drukpa Kagyu sect, gave impetus to the transformation of the cave into a monastery complex; Lorepa preached to about ten thousand disciples during a stay of roughly twenty years, and the monastery was constructed around this time by his disciples ¹². Its architectural language—whitewashed tapering stone masonry, wooden window structures, a floating roof, and a decorative golden turret—reflects the Tibetan inheritance, while its organization around a sacred cave, with the built structure ascending to frame and access the natural shrine, represents a distinctive adaptation to Bhutanese topography and spiritual geography ¹². The later visit of Kunkhyen Longchen Rabjam, considered the greatest Dzogchen practitioner to have visited Bhutan since Guru Rinpoche, elevated the wider Tharpaling locality, where he founded the broader Tharpaling complex—one of the eight lings (large monasteries) that propagated Buddhist teaching in Bhutan ¹².

The transmission continued through later figures. Nearly four hundred years after Guru Rinpoche, Ngogpa Choku Dorji (1036–1106), one of the four famous disciples of Marpa, became the earliest recorded great Buddhist figure to live in Bhutan, founding two temples still in use: Tang Langmalung Lhakhang (centred on a Lhamo Duedsolmai / Shri Devi statue) and Taggya Lhakhang in Chokhortoed (containing old Buddha statues brought from Tibet); neither retains old frescoes ¹⁸. In the fifteenth century, Thangtong Gyalpo carried Tibetan Buddhist architectural forms and cosmological principles into the region: his work in Bhutan from 1433 onward began with the Dungtsi Lhakhang in Paro, which adapted the chorten-lhakhang hybrid form to local geomantic circumstances while maintaining the cosmological mandala structure of Tibetan Buddhist architecture ³⁵. His own notes record that he had assisted in constructing the Jonang Kumbum in a former incarnation and participated in the Gyang Bumoche Kumbum, then applied these concepts to the Dungtsi Lhakhang and refined them in the Chung Riwoche Kumbum; the divided-bumpa system appears consistently across Jonang, Gyang Bumoche, and Dungtsi, suggesting a deliberate architectural lineage distinct from contemporary Kumbum forms such as Gyantse ³⁵. The Dungtsi Lhakhang’s internal organization—ground floor representing human life, basement representing the Bardo intermediate state, and upper bumpa displaying tantric deities—encodes Tibetan Buddhist cosmological teaching into architectural form, translating doctrine into a spatial experience of circumbulation and visual encounter ³⁵. The UNESCO survey likewise records Thangtong Gyalpo (here dated 1385–1464) as a Tibetan lama who built Tamchog Lhakhang and was known for his association with bridges and ferries and for building chortens on geomantic principles, while noting that it offers no architectural analysis of Tibetan influence on form, plan, or construction technique—establishing chronology and attribution but leaving the technical question of inheritance unexamined ⁹.

6.1.4 Bhutan within the wider Tibetan cultural world

The architectural inheritance is part of a broader cultural one. White traces the origin of the Bhutea clans to Tibetan monasteries, specifically Sakya and Ralong, describing the migration of eight families of the Bab-tsengyat clan from Kham through Lhasa and Sakya, with one prominent member, Gyet-bum-sar, gaining renown for his role in constructing the four pillars of Sakya Monastery ⁸. The founding of monasteries by migrating Tibetan lamas—Pashi Monastery and Sam-duk Lha-khang at Phari—represents the transplantation of Tibetan monastic architecture into the Himalayan region, the forms and constructional techniques of Tibetan Buddhism being carried with these lineages into Sikkim and Bhutan and adapted to local environmental and social conditions ⁸.

Denwood frames the same point structurally. Buddhism was imported into Tibet between the eighth and thirteenth centuries, mainly from northern India and Nepal, with Bhutan playing no part in that importation; the southern part of Bhutan was a zone of steep, jungle-covered hills, and it was to the north that the Bhutanese looked for new forms of religion ³⁰. Between the fourteenth and seventeenth centuries a number of monasteries were founded in the central belt of the country, belonging to several established orders of Tibetan Buddhism—mainly the Nyingmapa, Sakyapa, and various Kargyupa sub-orders, as well as the Bonpos in eastern Bhutan—but the rise of Bhutan as a self-contained state that staved off Tibetan control was associated with the hierarchs of the Drukpa Kargyupa order ³⁰. The Bhutanese are clearly part of the Tibetan cultural world: their main language is a dialect of Tibetan, and their social organization, material goods, building styles, folklore, and music are variants of what is found in southern and eastern Tibet, blended into a distinctive ensemble, with a thoroughly Tibetan type of farmhouse ³⁰.

Four characteristics declare the Bhutanese house to be of the general Tibetan type: reliance on heavy, load-bearing walls; a multi-storey arrangement in which people live above their animals; a flat roof used for storage and as an extension of living space; and poor provision for heating, the internal hearth being the sole means of cooking, heating, and often lighting after dark ³⁰. Individual features can be traced elsewhere in the Tibetan world: rammed-earth construction is common throughout eastern and southeastern Tibet; the peculiar pitched roof appears in parts of the Gyarong area of eastern Tibet; the slotting together of horizontal and vertical timbers is common in Chinese roofs of all ages (though China proper uses a complex bracketing system), and the wood-framed walls of the upper storeys may also owe something to Chinese carpentry; the trefoil-shaped windows must ultimately be borrowed from India, presumably via Tibet, as they are well known in Nepal and parts of India ³⁰. The small turret at the very top of monastic buildings is also common in southern Tibet and may derive from the tiered roofs of early Indian temples; since Bhutanese temples already possess height, it has not been necessary to emphasize them by piling up extra roofs as in Nepal, where the main image is placed on the ground floor ³⁰. The system of columns and beams used in monastic buildings is purely Tibetan and rarely seen in Bhutanese farmhouses, though developed from the columns often used in Tibetan farmhouses; it was standardized by the Tibetans into a regular “order” with a set arrangement of components, all of them borrowed ultimately from the Indo-Iranian world and imported into Tibet along with the rest of Buddhist culture ³⁰.

6.2 Pre-Zhabdrung fortresses and lineage architecture

Before the unification of Bhutan in the seventeenth century, the country was an assemblage of competing lineages, religious factions, and local potentates. Its architecture in this period falls into two intertwined strands: a secular tradition of fortified castles and towers descended from Tibetan strongholds, and a religious tradition of lineage seats and temples founded by saints, tertöns, and lama families. Much of this fabric is now ruined or rebuilt, and the record is correspondingly fragmentary.

6.2.1 Origins of the castle type

The dzong has its origins in the strongholds of local chiefs and petty kings of pre-Buddhist Tibet ^29,30. These strongholds often incorporated towers and were placed on rocky eminences overlooking the cultivated valleys ^29,30. Monasteries were first built in Tibet in the eighth century, at first on level valley land not too far from settlements; during the centuries of fighting—often provoked and led by rival monastic orders, lasting from the thirteenth century until after the first Shapdrung left for Tibet—many Tibetan monasteries were built with an eye to defence, sited on spurs or hills and provided with ramparts and defensive walls ³⁰. The castles, however, remained distinct from these monasteries, continued to concern themselves with military functions, and eventually formed a network of military-administrative centres responsible to whatever government was in power in their particular area ^29,30.

6.2.2 The post-imperial towers:kharandgyalkhar

A distinct tradition of stone towers entered Bhutan in the post-imperial period. Following the assassination of Lhase Darma (815–841/842; reign 841–842), the last king of the Pugyel dynasty, Lhase Tsangma and his retinue entered Bhutan and created or took over existing royal sites, building many royal castles called gyalkhar; these structures did not survive ¹⁸. Lhase Tsangma’s birth is dated to 800 AD on the basis of Nyangrel Nima Ozer’s work, and many palaces called khar are attributed to him and his descendants in old Bhutanese histories ¹⁸. A list from the Je 'bangs kyi rigs rus 'byung khungs gsal ba'i sgron me by Ngag dbang (1668) includes gyalkhar at Denpai Chenkhar, Choka Dorji’s Gyalkhar, Khaling Gyalkhar, Dungsam Khardung, Kholong Todki Gyalkhar, Uzorong Gyalkhar, Saling Gyantsham Gyalkhar, Tungkhar Gyalkhar, Ganzur Toed Gyalkhar (in Kurtoe), Jamkhar, Drengkhar, Domkhar, Phangkhar, Naykhar, and Dungsam Gyalkhar; these khars might have contained visual arts had they survived ¹⁸.

The khar—a tall stone tower—was the essential architecture of the Dung clan; multistoried towers of this type are still found in Lhobrag and Sichuan ¹⁸. The Dung people migrated southward owing to a Sakyapa military offensive between 1352 and 1354 and the destruction of their khars; Bhutanese khars, though shorter and slightly different from the classical Sichuan type, were densely distributed in eastern Bhutan ¹⁸. Because the Dung worshipped progenitor gods—Lha Ode Gungyel, Gurzhe, Namdorzhe, Yang chung, and Yum sum—these towers could have contained visual arts representing them, and striking iconography of some of these gods has been photographed in Kurtoe ¹⁸. The most famous ruins associated with Lhase Tsangma are those of Tsenkharla, which stand in a decrepit, unprotected condition above Tsenkharla Central School; carbon dating of timber from the ruins (Wylie bTsan-mkhar or Mi Zimpa) traced it to the 1430s, so the legendary khar could represent a consolidation of an earlier structure built by Lhase Tsangma ¹⁸.

6.2.3 Lineage seats and the foundations of saints and tertöns

Pre-Zhabdrung religious architecture was largely the work of lineage institutions—lama families and successions of treasure-revealers (tertöns)—whose estates and temples were the principal locus of grand frescoes by virtue of their artistic and architectural complexity ¹⁸. Three processes caused most old frescoes to disappear: many ancient pre-Zhabdrung dzongs collapsed into stone heaps shrouded in forest for unknown reasons; structures rebuilt in the post-Zhabdrung era after fire or abandonment of old rammed-earth buildings acquired new wall paintings; and original frescoes were progressively replaced by canvas-based wall paintings ¹⁸.

The succession of founding figures is long. In the thirteenth century, Guru Chokyi Wangchuk (Guru Chowang, 1212–1270) settled in eastern Bhutan and founded Lugchu Kuenzang Phodrang and Nalamdung Lhakhang in Kurtoe ¹⁸. Terton Sherab Mebar (1255–1315? or 1375–1435?) from Kham Chiwa founded Pangpaisa Ugyen Guru Lhakhang, Paro Japha Tsedrag Gonpa, and Tangsibi Lhakhang in Bumthang; repeated reconstruction left no old frescoes, though drawings on daphne-bark paper survive in Pangpaisa ¹⁸. Kunkhyen Longchen Ramjam (1308–1369) spent eight to ten years in Bhutan, but his eight residences and Chumey Samtenling are later constructions with no period frescoes ¹⁸. Terton Dorje Lingpa (1346–1405), born in Grayi Dentsa in Tibet, repeatedly visited Bhutan, and his descendant founded Tang Benzaybi Choeji, Jakar Lhakhang, Bay Langdra, and Chegina Lhakhang in Shaa Kashi ¹⁸. Buli Monastery belongs to this Nyingmapa lineage tradition: it was founded in the fifteenth century by Choeying, the heart son of Terton Dorji Lingpa, and an early-twentieth-century extension indicates continued development beyond its fifteenth-century foundation ¹³.

Thangtong Gyalpo (1385–1464? or 1361–1485?), born in Olpa Lhatse in Tsang, founded prolific monuments including approximately ten iron chain bridges in Bhutan, three of which survive; Dungtse Lhakhang, Bondey Chorten, and Merak Gengo Lhakhang (where his son Buchung Gyalwa Zangpo’s bodily relic is preserved) have endured ¹⁸. Dungtse underwent renovation and repainting several times, with major repainting in 1841 that erased ancient artworks, and Merak Gengo was also reconstructed and repainted; its rich artefacts were nearly taken to Tawang during Lam Nakseng and Genghis Khan Lhazang’s Mongol-Tibetan invasion of 1714, and a set of gold-lettered scripture volumes was transferred to Galing temple during Dzongpon Sey Dopola’s administration of Tashigang district ¹⁸.

The five great treasure revealers, classified retrospectively by Kongtrul Yonten Gyatsho Lodro Thaye (1813–1899), operated in Bhutan ¹⁸. Terton Ratnalingpa (1403–1479), possibly born in Bhutan on the border of Mon and Tibet, founded Karphu and Namkhar Lhakhangs in Khoma; much sculptural heritage forms part of the Karphu patrimony, though no frescoes remain owing to temple renewal ¹⁸. Terton Pema Lingpa (1445/50–1521) consecrated Tamshing temple, which retains frescoes, and also founded Korphu Temple, Bayzur Trel Lhakhang, Pemaling, and Dechenling Lhakhang—the last two, in Bumthang, having disappeared ¹⁸. His close disciple Chogden Gonpo (a reincarnation of Dorji Lingpa) founded Langthel and Drangla Lhakhangs in Tongsa; fine large metal statues attributed to Pema Lingpa survive in Gayden and Somrang Lhakhangs in the Ura valley, and the Guru statue in Taktshang is claimed, on stylistic grounds, to be his work ¹⁸. The frescoes and statues of Langthel Lhakhang are probably original, the single-storey building having required no reconstruction over time ¹⁸. The seventh Karmapa and fourth Shamarpa of Tibet, contemporaries of Pema Lingpa, built Thangbi Lhakhang, which contains a Buddha statue brought from Tibet’s Jang Yangpachen, though its frescoes have been repainted ¹⁸.

Khoma Lhakhang appears to be one pre-Zhabdrung temple whose statues and fresco wall paintings remain in authentic, original condition; it contains seemingly the oldest frescoes and statues, featuring Milarepa in an unusual painting style, and lies within the operational area of Guru Chowang ¹⁸. Its construction is attributed to a Lama Zhang of uncertain identity—whether Lama Zhang Yudrakpa Tsondru Drakpa (1123–1193) or another Lama Zhang associated with founding a monastery around Zhemgang dzong cannot be ascertained ¹⁸.

Among pre-Zhabdrung temples in western Bhutan, the most important were the products of five lamas—followers or descendants of Yeshey Bumpa, Gyalwa Lhanangpa, Dubthob Goed Tshangpa, Barwa Gyaltshen Pelzang, and Thangtong Gyalpo ¹⁸. Yeshey Bumpa (1245–1311), master of the Lhomon Kathogpa School, and his descendants became known as the Paro Dop Choejay of Shalabrag; Gyalwa Lhanangpa (1164–1224), founder of the Lhapa School, established Chelkha and ruled as head of lamas of five schools; Dubthob Goed Tsangpa founded Chilkarda monastery, his descendants founding Zarchen Choejay; Barwa Gyaltshen Pelzang (1310–1391), founder of the Shangpa Kagyud School, established Brangjaykha in Paro, his disciples setting up Goen Tshephug, Goen Nangsay Gonpa, and Jadud Gonpa in Haa; and Thangtong Gyalpo led to the Chakzampa school, his descendants (the Tamchog Choejay) living in Tamchog Lhakhang in Paro ¹⁸. The Bengali scholar and tantric master Vanaratna (1384–1468)—a contemporary of Thangtong and the only such Indian figure of the time—came from India to Bhutan, living in Paro Taktshang (where he had visions of Guru Rinpoche) and in Punakha; known in Bhutan as Nagi Rinchen, he built Dzongchung beside Punakha dzong and the temple at Zomlingthang/Khuruthang, and the Buddha statue he made in Dzongchung displays a style unique in Bhutan ¹⁸. He reached Paro in 1435 during his second visit to Tibet, representing one of the last mahasiddhas and panditas to transmit Vajrayana from India to the Himalayan region ¹⁸. Dubthob Gonpo Dorji, a follower of the Nasnyingpa abbot Gyaltshen Rinchen (1405–1468), founded Dzongdrakha Temple in Paro and began the Dzongdrakha Choejay line ¹⁸.

Phajo Drukgom Zhigpo (1179–1246)—though not part of the five lama groups—was religiously and genealogically the most significant lama in western Bhutan; his four sons and their descendants founded Shar Wachey Zhelngo, Chang Gangkha Zhelngo (based in Changangkha), and, most importantly, the Hungrel Choejay of Paro Hungral dzong, later taken over for Paro Rinpung dzong ¹⁸. All estates and temples associated with these grand lamas would have had frescoes, destroyed through periodic rebuilding ¹⁸. Lineage institutions also functioned as seats of family authority: the monastery of Tango (rTa-mgo), founded in the thirteenth century by Pha-jo 'Brug-sgom zhig-po, had been controlled by Tenzin Rabgye’s family for two generations before his rise to power and was bestowed on the Shabdrung as a religious gift by Tenzin Rabgye’s father, establishing a close relationship between the two families and functioning as a lineage seat prior to the Zhabdrung’s consolidation of centralized state power ⁴⁴.

6.2.4 The ruined pre-Zhabdrung dzongs

The fortresses of the valley potentates were the most architecturally complex pre-Zhabdrung structures, but most are now ruined. Pre-Zhabdrung dzongs now in ruins include Drabel (popularly Drapham) dzong and Yuwashing dzong (600 metres long), attributed to successive Chokhor Debs—Drabel dzong, the seat of the Chokhor Deb, collapsing soon after Desi Minjur Tenpa’s visit (1667–1680) with the younger Tenzin Rabgye ¹⁸. Other ruined dzongs include Garpang dzong (precursor of Jakar dzong); Jinyergang dzong, Zhungmeygang dzong, and Ura Dung Nagpo’s khar (attributed to successive Dungs of Ura); Bangtsho dzong; Shalingkhar (now Shalikhar) dzong in Shumar; Tsanzabi Drakar dzong; Yongkala Tongphu dzong; Paro Chubjakha dzong; Goen Obtsho dzong; and Khangma Dungsam Jadrung dzong (probably pre-Zhabdrung) ¹⁸. The remains of Bangtsho dzong were found not to be a dzong at all but a burial site with many levels of stone slabs; Yuwashing dzong was in use in Pema Lingpa’s time, his autobiography mentioning the incumbent Chokhor Deb, his queen, and the dzong repeatedly, and the biography of Terton Guru Choewang mentions the King of Bumthang, Chokhor Deb Tashi Dorji, whom he met during his Bumthang visit ¹⁸.

6.2.5 Lineage fortresses and the transition to centralized authority

The fortified lineage establishments of western Bhutan are documented most fully for the Lhapa and the Lords of Humrel. The Lhapa lineage, founded by the Tibetan lama Gyalwa Lhanangpa (1164–1224), was the first school to gain broad control in western Bhutan; they introduced administration from forts—an established Tibetan tradition—imposing on local districts obligations that included annual supplies of rice, butter, cotton, iron, and three periods of corvée labour, which generated considerable resentment and resistance ⁴². The Lhapas maintained fortified establishments, including Do Ngon Dzong in Thimphu, which they were forced to surrender in 1641 during the final struggles against Drukpa supremacy; other Lhapa fortresses, described as defensive monasteries, appear to have been destroyed by fire during these conflicts ⁴². Ruins of old buildings near sites associated with early dzongs, such as near Lingzhi Jagö Dzong, suggest that fortified structures existed in Bhutan by the twelfth century, predating the Zhabdrung era ⁴².

The origin of Paro (Rinpung) Dzong belongs to this lineage architecture. In the fifteenth century two brothers, Gyelchok and Gyelzom—descendants of Phajo Drugom Shigpo, founder of the Drukpa Kagyupa school in Bhutan—lived in the Paro valley; while Gyelzom established himself at Gantakha Monastery, Gyelchok returned from theological study in Tibet only to be refused by his brother, who declared there were no beggars in their family ³⁸. Gyelchok then went to live beside the river at Humrelkha, a place named after the guardian deity of Paro, Humrel Gompo, where he built a little building that would later become the Paro Dzong; his descendants became known as the “Lords of Humrel” and controlled a large part of the valley ³⁸. This lineage architecture, rooted in family settlement and local authority, persisted until 1645, when the Lords of Humrel gave their little fort to Shabdrung Ngawang Namgyel, recognizing his religious and political authority and marking the transition from lineage to centralized state architecture ³⁸.

White’s documentation does not explicitly address pre-Zhabdrung fortifications or lineage-specific traditions, though his narrative of the Bhutea clans and their settlement patterns implies the existence of early monastic and residential architecture associated with specific lineages; the reference does not provide sufficient detail to elaborate on the period ⁸.

6.3 The Zhabdrung era and the codification of the classical idiom

The seventeenth century brought the unification of Bhutan under Ngawang Namgyel and, with it, the codification of the dzong as the canonical architectural type for state and religious authority. The period established not only a standardized fortress-monastery plan but also an administrative system expressed in architecture, a master-builder tradition, a programme of state-sponsored temple-building, and a ritual protocol for ordinary house construction.

6.3.1 Ngawang Namgyel and the founding of the state

Ngawang Namgyel, who took the honorific title Zhabdrung (”at whose feet one submits”), arrived in western Bhutan in 1616 after being forced to flee Tibet ^42,29. He had been installed as the 18th abbot of the powerful Drukpa monastery at Ralung in Tsang, but his recognition was challenged by a rival supported by the Tsang ruler, and his arrival was followed by other scholars and followers escaping strife in Tibet ⁴². Settling in the upper Thim Chu valley, he began to carve out the state of Bhutan (also known as “Druk”), unifying the dual power of religious and secular authority in his person and establishing both a code of law and the dzong system; his successive reincarnations continued to rule, nominally or actually, until 1907, when the present royal family gained effective power and was recognized by the British Government of India ^42,29. The Zhabdrung Ngawang Namgyel (1594–1651) thus established the foundational architectural and institutional framework that would define Bhutanese building practice ⁴.

The administrative system conceived by the Shabdrung in the seventeenth century established the organizational framework within which Bhutanese architecture developed ²⁶. The Code of Laws he established, while maintaining its Buddhist foundations, was modified over time—notably when the Thrimzhung Chhenmo (the supreme law) entered into force in 1959 ²⁶. White’s note that the laws “formulated by Dugom Dorji in the sixteenth century” remained in force suggests a longer process of legal and administrative codification that may have extended to architectural practice, though the reference does not elaborate ⁸. The architectural expression of this order is the dzong type, which integrates monastic and civil functions within a fortified structure; the consistency of dzong organization across the country—central tower, surrounding courtyard, perimeter buildings—reflects the codification of administrative practice into architectural form, so that the dzong represents not merely a building type but the spatial manifestation of the Shabdrung’s institutional innovations ²⁶.

The dual system generated its own architectural dynamics. About a hundred years after the first outburst of fortress-monastery building in the face of foreign attack in the sixteenth century, there was renewed activity to make the shrines more resplendent ³⁷. The chief factor was the appointment of four Penlops (governors)—at Thaga, Thimphu, Tongsa, and Tashigong—by Tenzing Dukgyag, the first Deb Raja (temporal ruler), who, although owing allegiance to the Dharma Raja (the spiritual ruler, in the person of Lama Shubdung Ngawang Namgyal), participated in the dual control of the state by clergy and laity ³⁷. With authority divided between spiritual and temporal chiefs and the powerful regional governors, a situation developed resembling that of the three divided Malla kingdoms of Nepal; quarrels and divisions followed, and the rivals, vying for power and glory, erected religious monuments each claiming to be better, bigger, and more resplendent than the others ³⁷.

6.3.2 The first dzongs and the standardized plan

The first dzong constructed by the Zhabdrung was Simtokha, built in the Thimphu valley in 1629 and strategically positioned to control the main east-west trade route ^42,6,43. Named “the palace of the profound meaning of the secret mantra” (gsang snags zab don pho brang), it established the basic layout that would characterize Bhutanese dzongs: following the mandala pattern of Tibetan and Bhutanese temples, it has a rectangular plan of approximately 70 by 60 metres, a single southern entrance, a central courtyard surrounded by two-storey monastic quarters, and a central utsé housing the main shrines—a layout largely unchanged to the present day ⁴². The woodwork is simple and old, very worn in places, and the general scale rather small, but the building is solidly built of dressed stone, with strongly sloping walls that tie it into the irregular hillside; since Bhutanese farmhouses are built of rammed earth, it may be conjectured that the dressed-stone construction and detailing were the work of craftsmen from Tibet itself ²⁹. Simtokha served as a rough template for the sixteen historical dzongs still found in the kingdom, is noted as the oldest dzong in Bhutan, and has preserved its original design, making it exemplary of the classical idiom ^28,5. White, observing it as “Simtoka-jong,” identified it as the oldest fort in the country—situated on a projecting ridge with deep gullies, old and not in good repair, its central square tower surrounded on four sides not by the usual row of prayer-wheels but by a row of carved dark slate slabs depicting saints and holy men (including, on one face, an unflattering likeness of the German Emperor)—and read these slate panels and the building’s decorative variation as evidence of a pre-standardization phase, an earlier building tradition distinct from the later standardized dzong type ³.

Punakha, built in 1636–37, represents the apex of the Zhabdrung’s architectural achievement ⁴². According to legend, the carpenter Zow Balip fell asleep at the Zhabdrung’s feet and dreamed of the future dzong, describing on waking an impressive complex level by level; asked why so large a structure was needed when the Zhabdrung had few followers, he was told that there would soon be many ⁴². The building was designed to accommodate six hundred monks; by the end of the Zhabdrung’s reign the state monks numbered more than 360, the original target being reached about fifty years later and remaining fairly constant thereafter ⁴². Built eight years after Simtokha, in front of the Dzongchung, Punakha was the palace par excellence, intended to keep the Rangjung Karsapani, Bhutan’s most sacred relic ⁴. The second of the Shabdrung’s fortress-monasteries, it was founded at the confluence of the Mo and Pho rivers, completed the following year, measures 180 by 70 metres, and stands at the entrance to the Punakha valley ⁴³. It served as the winter residence for the Zhabdrung and his court, with his private quarters in the utsé; he went into retreat there and probably died in 1651, though his death was concealed beyond the turn of the century, and his remains are kept in the Machen Lhakhang adjacent to the utsé ⁴². The Zhabdrung established at Punakha the ritual of the new-year festival, a celebration of victories over invading Tibetan forces and a manifestation of his rule, at which envoys from all over Bhutan paid homage and donated the government’s share of taxes ⁴². The UNESCO survey records Punakha as erected in 1637 at the confluence of two rivers, damaged by fires (1332, 1986) and repeatedly rebuilt, with major repairs beginning in 1987 ⁹; one survey account dates its construction to 1657 ⁵.

The summer capital, Tashichö Dzong in the Thimphu valley, was created by enlarging and renaming the Lhapa stronghold: the bkra shis chos rdzong, “dzong of the glorious religion,” dates to 1641 ⁴². The Zhabdrung and his successors adhered to the local pattern of transhumance—seasonal migration between the valleys of Punakha and Thimphu—until the early 1950s, when the state government was permanently relocated to Tashichö Dzong, the seasonal migration being maintained thereafter by the monastic body, while Punakha remained the most sacred of all Bhutanese dzongs ^42,4. Aris records the summer capital as built in 1642 on the orders of the Shabdrung on the foundations of an older fort called Dongon or Donyuk Dzong, of which nothing remains; after destruction by fire in 1772 a new site was found and the fortress quickly rebuilt by command of the 16th Deb Raja, so that when the first British mission under Bogle arrived in 1774 the building had been standing only about a year ⁶. The tradition of alternating the seat of government and the monk body between Punakha and Tashichö (Thimphu) began around 1640 ^42,43.

The other great dzongs followed. Wangdu Phodrang Dzong, attributed to the Shabdrung and dated to about one hundred and forty years before 1783—placing it in the mid-seventeenth century—is an irregular, lofty stone structure of considerable solidity, with high solid walls and a single defended entrance, exemplary of the Shabdrung’s judgment in selecting sites for strength and beauty ⁷; the survey dates it to 1638, built on a spur dominating the confluence of two rivers, and under repair since 1983 with work on floors, pillars, staircases, and mural paintings ⁹. Trongsa was constructed on the Shabdrung’s orders as a springboard for his conquest of the eastern part of Bhutan, started in 1647; it became the residence of the kings of Bhutan and is the most complex and largest dzong in the country ^43,28. Drukgyel (Drukyel) Dzong was built by the Shabdrung in 1647 on a rocky spur blocking the Paro valley and protecting it from invasions from the north, commemorating his victory over the Tibetans in 1644; its name means “fortress of the victorious Drukpas,” and it was enlarged in 1651 by the Shabdrung’s half-brother Tenzing Drugda, then Paro Penlop, with protected passages still visible by which occupants could fetch water from a cistern safe from enemy arrows ^43,38. The survey describes Drugyel, built in 1647 at the northwestern end of the Paro valley at 2,700 metres, as the model of a fortress—with a fortified gateway, watchtowers (ta-dzong), and protected access to water—destroyed by accidental fire in 1951 and now in ruins ⁹. Chapcha dzong, built in the seventeenth century in Chukha district at 2,450 metres, is the only dzong built in pisé de terre (rammed earth), its utse severely damaged by recent earthquakes and lack of maintenance ⁹.

Paro Dzong itself was rebuilt by the Shabdrung: having received the fort from the Lords of Humrel in 1645, he immediately began a much more commanding fortress, consecrated in 1646; the survey notes that Paro (Rimpong) dzong, dating from the fifteenth century, was destroyed by fire in 1907 and immediately rebuilt ^38,9. The Ta Dzong, Paro Dzong’s ancient watchtower, was built around 1651 (the date uncertain) by Tenzing Drugda while Penlop of Paro and would later house the National Museum ³⁸. Cheri monastery, founded by the Shabdrung around 1620 at 2,950 metres, comprises a series of buildings—an utse, temples, and chapels—located at different levels on a steep slope ⁹.

The standardization is visible in White’s later observations: the parallelogram plan divided into successive courts, the square central tower, the flanking residential buildings, the defensive gateways and bridges, and the division between lay and monastic sections form a codified system applied consistently at Poonakha, Tashi-cho-jong, Angdu-phodang, and Tongsa ³. At Tongsa, the southernmost building was erected in great haste by the first Shabdung Rimpochi to check an inroad from the east of Bhutan, while the main tower (surmounted by a gilded canopy) and the five-storied building on the north side, originally erected by Mi-gyur Namgyal, the first Deb, represent the architectural elaboration of the era ³.

6.3.3 The master-builder tradition and the craftsmen

The codified architecture rested on a skilled workforce, much of it of Tibetan origin. The Zhabdrung’s most senior master-builder was Trulbi Zow Balingpa (Balip), believed to be an incarnation of the divine craftsman Vishwakarma ⁴. According to tradition he received supernatural guidance from the Zhabdrung to visit, in a dream, the heavenly Palace of Guru Rinpoche; on waking he carved a scale model from radish, which the Zhabdrung approved and commanded to be executed in wood ⁴. This model served as the prototype for the portable shrine (tashigomang) and, by some accounts, as the model for the construction of Punakha Dzong itself, and from it arose the expert woodworkers of Bhutan held to belong to the lineage of Balingpa ⁴. The dressed-stone construction and detailing of the early dzongs such as Simtokha may likewise be attributed to craftsmen from Tibet, since Bhutanese farmhouses were built of rammed earth ²⁹.

This Tibetan craft inheritance was reinforced by the seventeenth-century political crisis in Tibet. The rise to power of the Fifth Dalai Lama (1617–82), who called on the Mongol king Gushri Khan to put down his adversaries the Karma-pas and the Tsang, boded ill for Bhutan, which was allied with the latter; the king of Tsang was killed in battle in 1642, and the hard-pressed Garpa general escaped to southern Tibet, where he could rely on help from Bhutan, then ruled by Kargyu-pa priest-kings ³⁷. Anticipating attack by “Yellow Hat” forces, Bhutan strengthened her defences: the already formidable castle-monastery at Punakha (founded in 1527) became a great fort, and the fortress-monasteries of Wangdu Phodrang, Simtokha, and Thimphu rose on strategic sites either ringed by rivers or commanding hilltops; Punakha’s fears were realized when it was attacked in 1648 by an expedition from Bus, though the attack failed, partly through the inefficiency or complicity of the Fifth Dalai Lama’s regent, Norbu ³⁷. Among the many refugees who crossed into Bhutan at this time were quite a few craftsmen, as is evident from the numbers of bronze-casting studios and shops established at the Punakha, Simtokha, and Thimphu dzongs; the eastern Tibetan province of Kham, from which most refugees came, was already famous for its Kham-so bronzes ³⁷.

6.3.4 Gyalse Tenzin Rabgye and consolidation through temple-building

The codification continued under Gyalse Tenzin Rabgye (1638–96), the fourth Druk Desi and successor to the Shabdrung, whose reign from 1680 to 1694 his biographer identifies as a mission to consolidate the authority of the Drukpa state through two activities: the construction and restoration of numerous temples and monasteries, and ceremonial tours that served both religious and political functions ^44,45. The architectural projects reveal a systematic state investment in the built environment as an instrument of territorial and spiritual authority; the biography enumerates state resources devoted to temple restoration, the materials expended, and the chief artisans responsible ⁴⁴. One surviving remnant is the fortified stone staircase connecting the north side of Jakar Dzong to a deep well at the base of the hill, built to ensure a water source in times of warfare—a structure integrating defensive engineering with practical infrastructure ⁴⁴. His most ambitious project was a plan to recreate near Punakha the great sKu'bum of Gyantse, for which Nyingmapa assistants were sent to Tibet to prepare sketches and measurements, though the monument never came to fruition ⁴⁴.

The founding of Taktsang Lhakhang in 1692 exemplifies the architectural patronage and ceremonial deployment of building in this era. The temple, dedicated to Guru Rinpoche and known as the “Temple of the Guru with Eight Names” (Gu-ru mTshan-brgyad Lhakhang), was built on the sacred cliff-side meditation cave of Taktsang Pelphug, long associated with Padma Sambhava ^44,45. The plan originated with the Shabdrung himself, who had performed rituals there during the Tibetan war of 1644–46, invoking Padma Sambhava and protective deities for victory; in a meditative vision the local deity of Taktsang appeared to him in the form of a black man and offered the site, and the Nyingmapa caretakers concurred and gave him control, but he never executed his plan ^44,45. Tenzin Rabgye, remembering his participation in those events as a young monk in the Shabdrung’s entourage, chose to fulfil his teacher’s wish at the peak of his productive years ^44,45. Construction was supervised by the chief artisan Grags-pa rGya-mtsho (1646–1719), who oversaw the gilt cupola and interior artwork; work began in the tenth month of the Water Monkey year (1692) and was basically completed by 1694, when Tenzin Rabgye returned to perform the consecration ⁴⁴. A special appliqué hanging illustrating the eight forms of Padma Sambhava was created under the direction of his personal attendant, using select fabrics brought from Lahore, and the tradition of annual celebrations for the Tenth Day (Tshechu) of the fifth month was inaugurated then ⁴⁴. The biography records that prior to 1692 there were no other buildings in the immediate vicinity of Taktsang Pelphug—any earlier hermitages having long decayed, though the older hermitages of Zangdo Pelri and Orgyen Tsemo higher up the cliff still existed—so that all construction now found there dates from the 1692 foundation and later enlargements ^45,44. The same conclusion is recorded by Pommeret, who notes that the Shabdrung visited Taktsang in 1645 with his Nyingmapa master Rinzing Nyingpo and expressed his wish to build, but died before fulfilling it, the Fourth Desi Tenzing Rabgye arranging the present buildings in 1692 ³⁸.

Tenzin Rabgye’s broader programme extended beyond temples to the fabrication of statues and wall frescoes and the creation of monumental appliqué hangings (thongdröl); he was also notable for introducing the Tshechu festivals—seasonal celebrations combining Buddhist ritual with monastic and folk dancing—which became standardized in western Bhutan under his direction and were integrated into the ceremonial life of newly founded or restored temples ⁴⁵. His near-constant ceremonial tours, during which he conducted rituals, gave teachings, and oversaw construction, established a model of state-sponsored religious architecture that would characterize the classical period ⁴⁵.

6.3.5 The codified expression of church and state (Davis, 1783)

Davis’s observations of Tashichö Dzong in 1783 document the mature expression of the fortress-monastery type as established in the Zhabdrung era and maintained into the late eighteenth century ¹⁶. The plan divides the structure into two squares by a central building more lofty and ornamented than the rest, and the architectural vocabulary—thick stone-and-clay walls with an inward slope, a projecting roof with little slope, a timber frame executed without metal fasteners using mortises and tenons, large projecting balconies, and a painted ornamental programme of flowers and dragons in the Chinese taste—forms a coherent and distinctive system ¹⁶. The integration of temporal and spiritual authority within a single complex—the Rajah’s residence in the central structure crowned by a gilded turret housing a lama, with the chapel and priestly apartments occupying one of the two squares—represents the codified expression of the church-state relationship, the hierarchy of spaces, the prominence of the central structure, the defensive walls, and the absence of lower windows together demonstrating the translation of political and religious doctrine into built form ¹⁶.

6.3.6 The ritual codification of house construction

The codification of the era extended to ordinary domestic building, which followed established ritual and technical protocols ³¹. The inception of a house required a highly regarded astrologer, since performing the earth-deity rites (sa chog) was a solemn supernatural act; unpredictable illnesses and losses in a house were attributed to poor inception ritual, and the cost of a proper sachod was comparable to paying heavy restitution for taking a human life—in valleys like Paro, an astrologer was paid with a live jatsham (an expensive cow) ³¹. Several months before foundation-digging, the astrologer issued a long list of required articles: brass (or silver) offering containers; milk from both rust-coloured cows and snowy-white goats; yarns and silk ribbons of five primary colours; twenty-five ingredients for a treasure vase; and medicinal herbs for the foundation; he came equipped with antelope (tshos) antlers and a brass mini-spade ³¹.

On the appointed day, yarn was strung to mark the site boundaries, the four corners marked by banners of different colours indicating the cardinal directions; the astrologer pierced and marked the ground with an oryx antler and scooped soil with a delicate brass ladle, the striking of a red worm (chemuup) or wood charcoal being ominous ³¹. In the centre of the rectangular foundation a deep square hole was dug, in which a painted image of a female spirit—half-woman and half-snake (klu)—was set horizontally, representing the earth-divinity; the twenty-five ingredients in a vase and medicinal-herb powder were buried while the house owner, holding a mirror and offering scarf (kha dar), sought rewards and riches (dngobs grub) from the earth goddess ³¹. The treasure vase (bumter) was buried in the foundation’s centre, and among the well-to-do multiple bumter were placed, one at each corner; the astrologer supplicated the earth-goddess with incense and ritual cleansing, pacifying and “defanging” the other earth-owners to render them harmless ³¹.

The construction tasks were assigned by birth-year: the first foundation stone by a person born in the year of the ox; mud-spreading by a rat-year person; the timber-framed window assemblies (rab gsal) and doors by a tiger-year person; the truss supports (lding ri) by a tiger-year person; the first roof shingle by a bird-year person; and the main entrance door-frame by a tiger-year person, on which a white banner was hoisted and moved upward as the walls grew, eventually reaching the roof on completion ³¹. The main door typically faced southeast or east, never north—a principle derived from Chinese historical lessons regarding Mongol attacks from the north—and the first back-load of mud for the rammed-earth walls was carried by an ox-year person once the stone foundation wall reached sufficient height ³¹.

The prefabrication and mounting of the rabsel (panelled façade) marked a major stage, the astrologer appointing the day and directing which aspect of the building should receive it first; the rabsel usually covered the front of the second storey fully, spilling around either side ³¹. The day-long mounting ceremony involved gift-giving (typically cash in envelopes) to the householder, principal carpenter, patsi, and mason, with a designated person receiving and stacking the gifts while extolling and exaggerating their amounts ³¹. Upon completion, a lama presiding over the consecration donned a hat of auspiciousness (rten 'bral dbu zhwa) and circumambulated the house three times, followed by a crowd, concluding with a prosperity prayer; at this point the youngest or eldest child sat next to the namdag gosum (three doorways of purity) of the shrine room as the next householder, the inheritance being entrusted with the words: “From above, the threshold of a cattle pen door, and to below, the tip of the banner, we pass the inheritance on to you” ³¹. The principal carpenters were customarily entitled to a gho (usually a lungserm), an axe, and a sword, with separate payment, while a gho of lower value, an axe, and a dagger were given to the carpenter-engineer at the start; throughout construction the master builder-engineer received a special daily menu—creamier butter tea, protein-rich dishes, and stronger drink than ordinary workers ³¹.

6.3.7 Engineering works: bridges and defensive infrastructure

The Shabdrung era was also documented as establishing a standard of technical excellence. The bridge at Wangdu Phodrang is a sophisticated timber work composed entirely of fir without metal connectors, fastened by wooden pegs and incorporating three gateways with fortified structures; its durability—standing for nearly a century and a half without decay—was attributed to the properties of turpentine fir and the quality of construction ⁷. The chain bridge at Chuka was reckoned locally to be of more than mortal production, attributed to the dewta Tehuptchup (Tibetan drubthop, Sanskrit mahāsiddha, “great magician,” a title of Thangtong Gyalpo); the works assigned to him—the road up the mountain, with many parts held upon a precipice by iron pins and cramps uniting the stones, and the bridge at Chuka—do credit to his genius, while the castles of Chuka and Chupka or Kepta were probably built in the late seventeenth century to guard the trade route south to India and control the surrounding district ⁶.

The Zhabdrung era thus established the dzong as the primary architectural type for state and religious authority, the fortress-monastery combining administrative, military, and spiritual functions in a coherent formal system ³⁸, and embodying the integration of cosmological principles, functional requirements, and aesthetic ideals that characterizes the classical tradition ⁵. The survey records this body of foundational structures while noting that it does not itself analyze how they codified architectural form or established a classical idiom ⁹.

6.4 Post-Zhabdrung elaboration

After the Zhabdrung era, Bhutanese architecture underwent continuous elaboration and refinement within a stable typological framework. Each generation of patrons and master-builders contributed elaborations while maintaining the fundamental organizational and spiritual principles established earlier; the surviving structures were repaired, redecorated, rebuilt after disaster, and even set within modified landscapes, but the classical idiom persisted.

6.4.1 Continuous renewal within a stable typology

Punakha Dzong illustrates the principle of renewal within a stable type. Its configuration after the reconstruction of 1750 (following a fire) was extensively elaborated under the patronage of Bhutan’s 13th temporal ruler (desi) Sherab Wangchuk between 1744 and 1763 ⁴. Despite subsequent calamities—four fires (1798, 1802, 1831, and 1849) and the severe earthquake of 1897—the dzong’s configuration remained relatively stable through the early twentieth century, as documented by Rawling in 1904 and Weir in 1931 ⁴. In 1978, major changes comprised the demolition of a building standing in front of the dzong and the disappearance of the traditional cantilever bridges, which were replaced by modern suspension bridges built adjacent to the remains of the original structures ⁴. The post-Zhabdrung period thus demonstrates continuous architectural renewal within a stable typological framework, each generation contributing refinements while maintaining the fundamental principles of the Zhabdrung era ⁴.

6.4.2 Restoration and patronage by the clergy

The monastic hierarchy was an active patron of restoration through the nineteenth century. In 1839 the 25th Je Khenpo, Sherab Gyeltsen, ordered the restoration of Kyichu Lhakhang and donated a superb statue of Avalokiteshvara with a thousand hands and a thousand eyes ³⁸. In 1841 the same Je Khenpo decided to restore Dungtse Lhakhang, with all villages contributing to the effort, and the paintings were redone at this period ³⁸. The edifice at Taktsang underwent restoration in 1861–5 under the 34th Je Khenpo, Sheldrup Oezer, whose portrait can be seen in one of the temples ³⁸.

6.4.3 Reconstruction after disaster

Disaster repeatedly necessitated reconstruction, which characteristically preserved the original design. In October 1907 the Paro Dzong burnt almost to the ground but was immediately rebuilt to the same design by the Paro Penlop, Dawa Penjor, with money raised by a special tax levied throughout Bhutan—a reconstruction demonstrating the continuity of the classical idiom and the commitment to maintaining architectural coherence across generations ³⁸. Post-Zhabdrung development was, in general, evident in the elaboration and decoration of existing dzongs rather than the creation of new fortress types ³. At Tashi-cho-jong, the original tower destroyed in the 1897 earthquake was rebuilt by approximately 1902 with modern decorations, though the reconstruction proved structurally defective; at Tongsa, the Penlop rebuilt the two upper stories of the five-storied building after the 1897 earthquake and decorated them at his own expense, and the fine temples at Tongsa, each with a fine verandah, were repainted at Sir Ugyen’s expense ³.

The survey documents the same pattern of continuous modification and rebuilding among structures built after the Zhabdrung era, particularly in the sixteenth, seventeenth, and eighteenth centuries ⁹. Tongsa dzong, built in 1543, was enlarged in the mid-seventeenth century by the governor of Tongsa, Migyur Tenpa (1613–1680) ⁹. Tamshing monastery, founded in 1501 by Pemalingpa (1450–1521), remains almost unchanged from the early sixteenth century ⁹. Kurje Lhakhang in Bumthang is composed of three buildings: one built in 1652 by Choje Minjur Tenpa, the second in 1900 by the first king, Ugyen Wangchuk, and the third just completed at the time of the survey ⁹. Jakar dzong, built in the sixteenth century by Ngagi Wangchuk and restored by Choje Minjur Tenpa in the seventeenth century, was destroyed by earthquake and fire and completely rebuilt at the beginning of the twentieth century ⁹. The survey records that post-Zhabdrung structures were built by regional governors and saints (Pemalingpa, Longchen Rabjampa, Dorje Lingpa) and underwent continuous modification and rebuilding, but it does not analyze how post-Zhabdrung architecture elaborated or departed from earlier forms ⁹.

6.4.4 The dzong as a living type: decoration and landscape

Post-Zhabdrung interventions extended to the surroundings of the dzong, treating it as a living architectural type. At Angdu-phodang, one of the former Jongpens—who later became Deb Sangye—began cutting down the hill above the round fort about forty-five years before White’s observation, evidently intending to imitate the excellent flat in front of the main entrance, and planted rows of fir-trees to create a landscaped setting; the Tongsa Donyer restored one of the chapels at Angdu-phodang very well ³. These interventions demonstrate the continuation of the dzong as a living architectural type—subject to repair, decoration, and landscape modification by successive administrators—rather than a static historical form ³.

6.5 The Wangchuck dynasty and the threshold of modern architecture

The rise of the Wangchuck dynasty in the later nineteenth and twentieth centuries marks the threshold between the classical fortress-monastery tradition and modern Bhutanese building. The transition was expressed less through rupture than through a synthesis of existing typological languages: a new emphasis on the secular royal residence, continued patronage and maintenance of the dzong system, the faithful reproduction of the classical idiom in new construction, and—gradually—the loss of the fortress’s defensive character and the adoption of new materials.

6.5.1 Wangdu Choling Dzong: from fortress-monastery to royal residence

Wangdu Choling Dzong marks the critical moment of transition from the pre-dynastic fortress-monasteries to the domestic architecture of the founding Wangchuck lineage ⁴⁷. It was built in 1857 by Gongsar Jigme Namgyel, predating the establishment of the monarchy by fifty years yet becoming the architectural foundation upon which the first three kings conducted their rule ⁴⁷. (Pommaret dates the building to 1858, following Jigme Namgyal’s consolidation of power after the conflict of 1857–58 with the Jakar Dzongpon Tsondru Gyeltshen ⁴⁹.) Its construction followed Jigme Namgyel’s military victory over the Jakar Dzongpon Tsöndru Gyaltshen in 1857, when the armies clashed on the field of Shamkhar; the dzong was erected at the site of the military camp to commemorate the victory and to establish the legitimacy of his claim to the post of Trongsa Pönlop, and the name Wangdu Choling—“Fortress of the Land of Dharma and Victory”—encodes this political achievement in architectural form ⁴⁸.

The building represents an innovation in Bhutanese architectural practice. Unlike the dzongs established by the Zhabdrung, which embodied a dual system of religious and temporal governance, Wangdu Choling was conceived as a secular residence; this distinction marks a shift in how elite power was spatially expressed, the palace separating domestic and administrative functions from monastic life even as it incorporated religious chambers within its programme ⁴⁷. The document identifies it as “one of the finest examples of domestic architecture in the country” and “the oldest of all the structures that were built by the Monarchs of the country,” its status as a masterpiece reflecting both its technical accomplishment and its role as a prototype for subsequent royal residences ⁴⁷. The Utse, built by Jigme Namgyel himself, established a formal standard preserved through later renovations, and the palace’s coherence—a “masterful blend of innovative architectural features present in the Dzongs as well as in the manor houses”—shows how the threshold of modern monarchy was expressed through a synthesis of existing typological languages rather than through rupture ⁴⁷.

When Gongsar Ugyen Wangchuck was proclaimed the first Wangchuck monarch in 1907, Wangdu Choling became the first Palace of the dynasty and the institutional seat from which the modern Bhutanese state was shaped; the First King pursued political consolidation through family alliances, appointing key officials from his own kinship networks ⁴⁸. Pommaret records that the central tower was commissioned by Jigme Namgyal, with extensions added by Ugyen Wangchuck, and that both the First and Second Kings used the palace as a residence ⁴⁹. The Second King, Jigme Wangchuck, undertook a major renovation and reconstruction of the complex, dispatching approximately three hundred master builders (garpas) from multiple dzongkhags, while the Utse was preserved in its original form as a representation of Jigme Namgyel’s craftsmanship and historical significance ^48,49. The planned reconstruction of 1950–51 represents a moment of modernization within the traditional idiom—involving substantial labour mobilization and the replacement of deteriorated elements, particularly the large windows (rabsel) of the central tower, while preserving the original structure—but it was never completed, owing to the Second King’s death in 1952 ⁴⁹.

The palace’s role extended to education and cultural development. Gongsar Ugyen Wangchuck opened the first modern school, Wangchuck Lhodzong, at Hān in 1914, followed by the Thrinle Rabten School attached to Wangdu Choling in 1915; the Crown Prince Jigme Wangchuck received formal education at the latter alongside children of attendants and nobility, studying Hindi, English, and traditional Bhutanese subjects, and these schools were subsequently improved and upgraded by King Jigme Wangchuck, establishing Wangdu Choling as a centre of educational innovation at the threshold of Bhutan’s modernization ⁴⁸.

6.5.2 Architectural patronage of the early kings

The early Wangchuck period showed no radical departure from the classical dzong type, but rather the continuation and refinement of fortress-monastery architecture as the primary instrument of state authority and administration ³. Sir Ugyen Wang-chuk, the Tongsa Penlop, demonstrated his authority through control of fortress architecture: at Tongsa he rebuilt and decorated the upper stories of the five-storied building after the 1897 earthquake at his own expense and had the fine temples repainted at his expense ³. The presentation of the K.C.I.E. insignia to Sir Ugyen Wang-chuk in the Durbar Hall at Poonakha in 1909 took place in a space decorated with embroidered Chinese silk canopies and fine kuthang (needlework pictures), reflecting the continued use of dzongs as ceremonial centres for state occasions ³.

The survey records the dynasty’s construction and reconstruction. Kurje Lhakhang’s second building was constructed in 1900 by Ugyen Wangchuk; Lame Gompa, a huge mansion, was built in 1890 by the first king and now houses a school of forestry; and Domkar-Tashicholing, a royal palace, was built in 1937 as the residence of the second king ⁹. The survey identifies these structures as marking a transition but provides no analysis of how they differ from earlier architecture or represent a threshold toward modern practice ⁹. The Ta Dzong of Paro figures in the dynasty’s history both as a place of confinement and as an early heritage project: in 1872 Ugyen Wangchuck, the future First King, was imprisoned in the Ta Dzong when he came to put down a revolt; by the 1950s it had fallen into badly dilapidated condition; and in 1965 the Third King, Jigme Dorji Wangchuck, conceived the idea of restoring it as a place to house the National Museum, which was inaugurated in 1968 ³⁸.

6.5.3 Continuity of the classical idiom in modern construction

Modern construction continued to reproduce traditional technique with such fidelity as to be indistinguishable from older work. In 1968 H.M. Ashi Kesang, the Queen Mother of Bhutan, arranged for a second temple to be built alongside the first at Kyichu Lhakhang in the same style; it is so skilfully constructed that it is impossible to discern any difference between the two, demonstrating the continuity of traditional building technique and the commitment to maintaining formal coherence in contemporary practice ³⁸.

6.5.4 The threshold of modern change

Modernity nonetheless brought substantive change to the dzong type. Although many dzongs have been rebuilt and repaired over the centuries and function today much as they always have, over the last 150 years or so they have lost their role as places of refuge; in consequence their military architecture is being gradually lost through rebuilding after earthquake or fire, new dzongs are being built devoid of any form of fortification, and the original wooden shingles have been replaced with galvanized tin sheeting ²⁸. Royal patronage shifted toward new construction in the capital: the Third King moved the royal residence to Ugyen Pelri Palace in Paro and later to Dechencholing Palace in Thimphu, signalling a shift in royal architectural patronage away from the old palace at Wangdu Choling ⁴⁹. The capital dzong itself was transformed for modern government: Tashichho dzong in Thimphu was completely remodelled and enlarged between 1962 and 1969 to house the administration of the Royal Government of Bhutan and the National Assembly, the survey noting it as a fine example of Bhutanese architecture and observing that its fairly good condition suggests that twentieth-century construction or reconstruction maintains structural integrity better than earlier work ⁹.

7 Architecture in the Landscape

The individual building is never wholly intelligible in isolation, and this section widens the frame from the single structure to its setting, its grouping, and the works that connect it to others. Its subject is architecture in the landscape: the deliberate placement of buildings, the morphology of rural and urban settlement, and the engineering infrastructure that bound an otherwise fragmented mountain territory together. The section treats these as a continuum of scales. It begins with the art of siting, governed across the sources by topography, climate, agriculture, defence, cosmology, and aesthetics, and singled out by several observers as a defining strength of Bhutanese building (7.1). It then examines rural settlement morphology and the place of the house in the landscape—the contrast of dispersed and nucleated patterns, the village as a social and supernatural order, and the demographic and seasonal dimensions of high-valley occupation (7.2). From the rural pattern it turns to the dzong as the nucleus from which proto-urban and, latterly, planned urban form has emerged (7.3). It closes with infrastructure and engineering works—bridges and crossing technology, iron mining and metallurgy, water supply and milling, roads and trails, and their modern successors in hydroelectricity and motor roads—understood both as practical responses to a difficult terrain and hydrology and as undertakings bound up with religion, trade, and state labour obligations (7.4). The connecting question is how a built tradition organised itself across a vertical, broken country, and how landscape, settlement, and infrastructure together conditioned where and how Bhutanese architecture could exist.

7.1 Siting and the architecture of the landscape

Across the sources, the placement of buildings in the landscape is treated as a deliberate and systematic art, governed by topography, climate, agriculture, defence, cosmology, and aesthetics. Several observers single out siting as a defining strength of Bhutanese building.

7.1.1 Principles of siting: topography, climate, and agriculture

Bhutanese settlement and architecture are fundamentally responsive to topography. The layout of settlements and their architecture are governed by the undulation of the land, the availability of indigenous materials, the influence of religion, and the economic set-up ²². Limited agricultural land and water supply drive the clustering of dwellings, while individual houses tend to occupy commanding hillsides above the land used for cultivation, positioned to dominate and survey the agricultural landscape while remaining defensible ²².

Buildings are placed according to agricultural logic and their relationship to the natural landscape. The characteristic pattern consists of dispersed farmhouse groups scattered through valleys surrounded by partly de-forested but still verdant mountain slopes, with the dzong built on a commanding site as the religious, administrative, and social centre of the region ²⁴. The siting of buildings relates favourably to the sun and wind, and the placement of structures follows the logic of the cultivated landscape ²⁴.

Denwood describes the Bhutanese as settled in a central zone about fifty miles wide lying at an altitude of five to twelve thousand feet; south of this zone the jungly hills are cultivated on their southern fringe by settlers of Nepalese origin, and to the north the treeless mountains and plateaux bordering Tibet support only a few nomads ²⁹. Within this zone the Bhutanese proper live in small hamlets or villages amid terraced ricefields in the valley bottoms, or higher up on grassy spurs ²⁹. Farmhouses stand in small hamlets just above the ricefields that occupy the lower slopes and valley floor, with thick jungle covering the slopes above—a source of firewood and leaves for fodder—though over most of the inhabited area the jungle would be replaced by scrubland or pine forest ²⁹.

Climate and elevation shaped the choice of site. The early embassy accounts dwell on the healthfulness of elevated, well-drained positions: the situation of Tashichö Dzong (Tassisudon), “elevated into so pure a region of the air,” was held to be healthy in every season because no water could lodge and stagnate, and the surface was not so closely covered with wood as to produce unwholesome vapour ²⁰⁶. The palace of Tassisudon stands near the centre of a valley about five miles long and one mile broad, entirely surrounded by high mountains—a “softened glen” through which the river Thinchu passes, its banks forming rich, cultivable soil that the Bhutanese irrigate artificially from the springs of the surrounding mountains ⁶. There was no town, nor any house except the embassy’s, within a mile of the palace, but a few clusters of houses were distributed among the fields, serving as “points of rest” for the eye amid the bold mountain scenery ⁶. Nearby, the castle of Chupka (Kepta) is built about halfway up the mountain in a “bleak but beautifully romantic situation,” among the highest mountains seen in Bhutan ⁶.

7.1.2 Defensive and strategic siting

Defensive considerations consistently place dzongs and monasteries at natural chokepoints or otherwise defensible positions. Bhutanese fortresses are sited on commanding ridges or tongues of land between rivers, integrating defensive requirements with landscape control ³:

• Poonakha-jong stands on a tongue of land between the rivers Mo-chhu and Po-chhu just above their junction; both rivers are unfordable, giving natural protection on three sides of the parallelogram, with access by two substantial cantilever bridges strengthened by gateways and defensive towers, and a massive masonry wall running from river to river on the only land side ³.
• Simtoka-jong is sited on a projecting ridge with deep gullies separating it from the main hill ³.
• Tashi-cho-jong is protected on the west and north by a wide fosse filled with water ³.
• Tongsa-jong is built on a ridge above the Madu-chhu gorge, positioned to command the narrow gorge through which the stream flows ³.

Denwood likewise notes that monasteries such as Talo are sited on the top of a spur where a patch of comparatively level ground carries a small village, a good thousand feet above the valley floor; such locations command magnificent views, and defensive possibilities were doubtless in mind when they were built ²⁹. The dzongs at Simtokha and Paro occupy the same type of site, only a short way above their respective valley bottoms, while Punakha Dzong is the only one built on level valley land ²⁹. Settlement planning incorporated defensive and hydraulic considerations together: the biography of Tenzin Rabgye records, for example, the fortified stone staircase at Jakar Dzong connecting the north side of the dzong to a deep well at the base of the hill, built to ensure a water source in times of warfare ⁴⁵.

7.1.3 Cosmological and geomantic siting; sacred geography

Siting was also governed by cosmological and geomantic logic, integrating buildings with landscape features, directional orientation, and local spirit cults.

The temples of the mTha'-dul / Yang-dul scheme are distributed across the Tibetan landscape and its extension into Bhutan according to a cosmological logic that integrates building placement with landscape features and directional orientation ¹. The scheme’s restructuring from a Chinese north–south axis to an east–west axis reflects Tibetan geographical understanding, with the country conceived as lying up in the west (sTod mNga'-ris) and down in the east (mDo-smad Khams); the four Ru-gnon temples in central Tibet form a rough square encompassing the core territories, the mTha'-dul temples lie at the elbows and knees of the supine demoness representing Tibet, and the Yang-dul temples occupy the extremities—soles and palms—representing the outermost zones ¹. The temples' siting reflects geomantic principles derived from Chinese tradition: a preference for land “open” to the east, “heaped” to the south, “straight” to the west, and “curtain-like” to the north ¹. Specific temples are located in relation to rivers and valleys—Bu-chu in Kong-po six miles up the Nyang-chu from the gTsang-po, Kho-mthing in lHo-brag just north of Bumthang, and the temples of Byams-pa'i lHa-khang in the Chos-'khor valley of Bumthang and sKyer-chu in the sPa-gro valley occupying outer zones of the scheme ¹. Their position south of the main Himalayan range affirms Tibetan expansion and the civilizing influence of Buddhism into frontier territories, and their association with rivers, valleys, mountain passes, local spirit cults, and megalithic sites marks them as nodes in a sacred geography that integrated Buddhist teaching with landscape sacralization and the subjugation of local spiritual forces ¹.

The siting of Punakha Dzong exemplifies how practical and cosmological considerations combine ⁴. The valley lies in the southernmost part of the Punakha dzongkhag and is relatively wide and flat; the dzong is positioned at the lower end of the valley at the confluence of the “mother” river (Mo chhu) and the “father” river (Pho chhu), which before merging embrace a hill known as the Jilligang, at the foot of which the monastery-fortress emerges “like a ship” ⁴. From the viewpoint of oriental geomancy, the dzong is embraced by two merging rivers attributed with feminine (mo) and masculine (pho) characteristics, while founding legends speak of the Jilligang Hill as a “reclining elephant,” reflecting pre-Buddhist traditions of geomantic divination and animism; the “taming” and founding of the setting is ascribed to Guru Rinpoche in the 8th century ⁴. The confluence, suddenly appearing from behind a bulky mountain foot, may also have served early travellers as a landmark for orientation ⁴. Notably, although the moderate climate attracted rural households to settle on the gently sloping terraces of the side valleys, Punakha Dzong—unlike dzongs positioned on hillsides—was sited on the valley floor and never stimulated the development of an urban centre in its vicinity ⁴.

The Choedrak monastery shows how a building can be generated by the spiritual geography of its site ¹². It is sited against a rocky cliff at an elevation of 3,800 metres on the northern ridge overlooking the Chumey valley of Bumthang; the cliff face, nearly 25 metres in descent, is an integral element of the composition, with almost two-thirds of the lhakhang’s northern façade blended into the rock ¹². The longer side of the lhakhang faces south, serving both passive solar heating and visual command over the valley, so that the monastery is simultaneously prominent within the landscape and integrated into the natural rock formation ¹². The spiritual and spatial generator of the entire complex is a sacred cave within the cliff—approximately 4 by 4.4 metres, set one metre above the third-floor level and functioning as the Goenkhang; the built lhakhang was constructed to culminate in and provide access to this pre-existing sacred site, emerging from the imperative to frame and sanctify the cave rather than being imposed on the landscape ¹². Its construction on such difficult terrain with local manpower—undertaken, in Bhutanese practice, as community service believed to accumulate merit—signifies the importance of the place ¹². The site is reached from the Bumthang–Trongsa–Thimphu highway through the Gaytsa community, roughly one hour’s drive to Tharpaling and a further fifteen minutes' walk, a remoteness that has preserved its character as a secluded retreat ¹².

Religious structures were also distributed through the landscape along routes of travel. Prayer walls and associated chhorten are positioned along Bhutan’s old public by-ways and mountain trails connecting hillside villages and monasteries; in the eastern valleys, where transport was formerly by walking or horse along mountain trails, these monuments line the steep, wooded slopes and old pathways ⁴⁶. Their positioning serves a territorial and political function, marking routes of passage and community boundaries, and they were clearly meant to be encountered and engaged with by passers-by; a comprehensive survey of surviving Mani Dangrim might therefore reveal much about the location of Bhutan’s pre-modern paths and roadways ⁴⁶. Davis similarly observed that village monasteries and hermitages were distributed by a topographical logic—there was scarcely a patch of cultivable land without a village on some adjacent height inhabited by priests supported by the peasants beneath—while hermitages occupied by faquires were sited in lonely places high among the rocks and jungle, and wayside shrines and prayer-wheels were distributed along the routes of travel to be encountered by devout passengers ¹⁶. This distribution expressed a spatial hierarchy of authority: Tashichö Dzong served as the summer capital in the Thinphu valley, while the young Lama was kept at a small castle in an unfrequented place about a day’s journey away among the mountains ¹⁶. The Rajah, for his part, maintained many principal castles, palaces, and smaller villas in varied situations and climates, retiring from Tashichö Dzong to the milder valley of Ponaka in winter, so that by a few days' journey he could “experience all the different degrees of temperature between the extremes of arctic and Bengal conditions” ²⁰.

7.1.4 Siting as aesthetic and the modification of landscape

Several observers treat siting as a matter of artistic sensibility as well as practical necessity. White holds the excellence of siting to be a fundamental principle of Bhutanese architecture, noting that the sites chosen are excellent both for defence in the forts and for habitation in the private dwellings ⁸. Sir George Birdwood’s accompanying discussion identifies a systematic, topography-responsive approach—an “added ascent” given to buildings hanging on hillsides and an “appropriate platitude” to those stretched along their base, beside rivers, or over level plains—and observes that the sloped walls and deep roof projections, while structural and climatic in function, also lend the buildings a visual coherence and an appearance of “sure-footedness and stability” on steep terrain ⁸. In a similar spirit, Lall judges that Bhutanese villages and buildings stand in fine ecological balance with their environment, being aesthetic and appropriate and adding “an element of interest and a climax to the landscape” ²⁴.

Siting could also involve active modification of the landscape. At Angdu-phodang, the hill above the round fort was cut down and rows of fir trees planted, demonstrating the deliberate shaping of terrain to create level spaces and aesthetic settings for settlement ³.

---

7.2 Rural settlement morphology and the house in the landscape

Rural Bhutan is described through two recurring units: the dispersed or clustered village, and the individual house set within its garden and fields. The sources differ on whether settlement is essentially dispersed or nucleated, and they document the village as both a social and a supernatural order.

7.2.1 Dispersed versus nucleated settlement

The sources present settlement in two ways that partly conflict and partly reflect regional variation. Bhattacharyya emphasises nucleation: rural settlement takes the form of dwelling clusters, each cluster constituting a village, with dwellings clustered together because of the limited agricultural land and water available nearby—producing nucleated villages rather than dispersed homesteads ²². Within this pattern, individual houses occupy commanding hillside positions, each surrounded by its own agricultural plot and protected by stone-and-mud-fenced walls that define the boundary between domestic and productive space, so that the house functions as a settlement unit integrating dwelling, cultivation, and defence ²².

White and Lall, by contrast, emphasise dispersal. White describes a dispersed morphology in which houses are scattered individually across hillsides rather than nucleated in dense villages: at Ta-lo monastery, small, well-built two-storied houses with carved verandahs and painted fronts stand individually in gardens of flowers and trees, with decorated chotens breaking the monotony; the individual house in its garden is the basic unit of rural settlement, positioned to take advantage of slope, aspect, and water ³. The village of Ridha sits on a knoll above a fine open space with plenty of flat ground, and the Tang-chhu valley shows better cultivation and prosperity than other valleys ³. Lall likewise describes the characteristic pattern as dispersed farmhouse groups of substantial prosperity—large, well-maintained homes scattered through valleys—and explicitly contrasts this with the compact village settlements of Ladakh, attributing the difference to Bhutan’s more generous rainfall and fertile valleys ²⁴.

Both accounts agree that the dispersed or clustered domestic landscape stands in contrast to the nucleated dzong. White frames the dispersed settlement pattern as the opposite of the dzong, which concentrates administrative, monastic, and military functions in a single fortified complex ³. Lall describes a settlement hierarchy in which the Dzong—combining administrative offices, monastery, and fort, strategically placed and standing in isolation—anchors a landscape of family-scale farmhouses dispersed among the cultivated fields ²⁴. Denwood, working at the scale of the hamlet, describes farmhouses standing together with a few others in small hamlets just above the ricefields, each house with a walled yard in front where cattle browse on leaves collected in the jungle; pigs and cattle are the main livestock, rice the main crop, and petty trading in the Tibetan manner brings extra income to many of the farmers who form the bulk of the population ²⁹.

7.2.2 The village as a social and supernatural order

The village is documented not only as a physical arrangement but as a social and cosmological whole. A village was “a cosmos of its own,” where both supernatural and natural beings had their spaces, with sacred spaces of supernatural beings located both in the house and in the landscape ²⁵. It was populated by a wide variety of people—seasonal foot traders and livestock brokers, herders and farmers, priests and laymen, shamans and devotees, eccentrics and gossips, elderly loners who had taken up religious life, and the able-bodied and disabled, old and young alike ²⁵.

A bigger village always had a small floating population that shifted with the seasons: in summer, especially during harvests, monks and priests presented themselves for the tithe collection of grain, circling the fields while owners harvested; in winter, people from higher altitudes migrated to tropical places to gather food already stocked in barns, poorer people gleaned the fields, and Tibetan metal-smiths and their families set up workshops to mend utensils and implements ²⁵. The village was also a scene of peripatetic craftsmen and vendors of imported trinkets, mirrors, needles, and cotton goods ²⁵.

The supernatural order was woven into the settlement. Some villages had feared families known as poison-givers, and most villages included a household or two host to gyalpo, a class of malevolent spirits believed to cause accidents and illness ²⁵. Every village precinct had several genuinely local supernatural lords—the lords of the land (gnas bdag gzhi bdag)—to whom some households made symbolic offerings; ecologically, these lords had a protective effect, since the most ecologically sensitive and richest microenvironments were regarded as their abodes and held off limits, including eddying pools and confluences, dominant trees, dark lichen-hung woodlands, waterfalls, cliffs, rocks, caves, summits, lakes, marshlands, and springheads ²⁵. The village was equally a residence of livestock: hoary old animals were honoured for lifelong service, yaks, sheep, and mithun were kept according to altitude, and almost every village had ubiquitous fowls, dogs, goats, and scavenging swine, with pig-rearing widespread for feasts, votive offerings, and oil in the diet of poorer households ²⁵.

This devotional dimension extended into the domestic interior. Davis noted that the common people made a little domestic altar near the house, a pile of stones about three feet high before which they laid leaves, fruits, or blades of corn, so that the domestic space was organised around this altar as its cosmological and devotional centre ¹⁶. Davis also recorded the relationship between elevated monastic villages and the cultivated fields below: the villages of priests, well built with lofty whitewashed houses, were often beautiful from the road, and each fraternity had its chapel, altar, and Lama-guru while drawing its support from the peasants beneath; the cultivators possessed farms, could be appointed to preside in inferior districts, and were expected to be ready when called upon for duty ¹⁶.

7.2.3 The house in the landscape

The individual house is described as carefully oriented and embedded in a productive, symbolic garden landscape. In the inner-Himalayan valleys the house is sited with consistent orientation, its front—containing the primary windows and entrance—facing south to maximise solar gain and light to the upper-floor living quarters, while the cattle barn occupies the ground floor below, establishing a functional hierarchy responsive to both animal husbandry and human comfort ³². The house type varies with elevation: thatched bamboo houses predominate at the lower southern altitudes, simple stone structures and yak-hair tents appear at the highest elevations, and the inner-Himalayan zone around Paro and Thimphu shows the most developed and elaborate version of the type, described as “oddly reminiscent of Swiss chalets” ³².

Ura’s account elaborates the house’s relationship to footpaths, views, and trees. Traditional villages had houses clustered in close proximity, with large spaces preserved for footpaths and vegetable plots ³¹. Footpaths and trails were inviolable—an old saying held that “path of human beings and path of corpses should not be blocked,” the community would rise against anyone who encroached on a footpath, and a human corpse in transport took priority over all travellers, who were required to stand below the path deferentially because the corpse was associated with siddhi (supernatural accomplishment) and regarded as a “godsend” ³¹. Houses stood side by side or back-to-back, nearness indicating distant blood ties; when rebuilt, they moved only short distances from their original sites because of the labour cost of shifting stones, until the advent of vehicles drew houses to disperse toward vehicular traffic ³¹. Every house commanded an unobstructed, painting-like view of the high horizon and of light flooding through trees—a perspective that also served the practical purposes of good wind flow and a high vantage point for monitoring livestock and fields ³¹. Peach trees and willows at the edges of vegetable gardens formed an emblematic fringe (with oranges, bananas, and ficus nemoralis, or oomshing, in subtropical regions); in winter the seasonal death of peach and coppiced willow trees gave clear perches for non-migratory birds, and the trunks of old willows were worn bone-smooth from tethering cattle ³¹. The base of a peach trunk often sheltered a mini-house for an earth deity, propitiated with offerings of popped white wheat or rice and milk; the peach also produced kernels that were pounded into a butter-substitute for butter-tea ³¹.

7.2.4 Village scale, demography, and altitude

The modal village had about twenty houses, meaning roughly two hundred people lived in an intimately related way—an estimate based on the fact that in the 1970s and 1980s the country had about 4,000 hamlets containing around 80,000 households ²⁵. Village size ranged from about three houses to sixty or so, and the number of houses generally increased with altitude: in alpine valleys houses were both more numerous and more populous, with the peak reached in high-altitude settlements such as Sakteng, Jangphu, Ura, and Merak ²⁵. This concentration seems to have been driven by the need for buildings to adhere together physically to create pockets of warmth during harsh winters and to foster interdependence when isolation increased, reinforced by the fact that the land around a house at high altitude was less productive than tropical farmland, giving people little incentive to scatter their houses ²⁵.

The Ura and Eutsa villages illustrate this scale and its internal organisation. Ura comprises 64 households with approximately 360 inhabitants living in some 50 houses, forming a loose cluster of traditionally appearing buildings with an irregular network of unpaved lanes and vegetable gardens, all compounds surrounded by natural stone walls ²³. The village is divided into four neighbourhoods—Trabi, Toepa, Tarzhong, and Chari—which are defined not by social or economic status but by mutual obligations and collective labour, including help with house building, financial assistance for death rituals, and land-use arrangements ²³. At the lower edge near the small river stand four water mills (chu thag), two community-owned and operated under strict regulation of turns and the others private, charging one bamboo plate (tang lub) of flour per use; the upper edge is dominated by the Ura lakhang with roughly 12-metre prayer flags (darshing) erected for deceased villagers, and the village contains 47 chorten that the community has been obliged to maintain since 2013—an obligation the headman (Gup) reports is not possible to meet for lack of funds and free labour ²³.

7.2.5 Seasonal settlement and the historical depth of high-valley occupation

Some settlements were seasonal. The Eutsa village consists of nine houses inhabited by eight households—one apparently abandoned and only two used year-round—all free-standing with nearby stables and surrounding gardens and fields; it is used only as a temporary residence from February to September, its inhabitants migrating to the winter village of Shangawang at 2,000 metres altitude where paddies can be cultivated, which explains why most Eutsa houses appear poorly maintained ²³. Eutsa houses are enclosed by wooden fences and one-metre natural stone walls, vary in height from two to three storeys while keeping a similar ground-floor footprint, and show a distinctive consistent orientation toward the valley bottom (east) regardless of cardinal directions; a narrow gravel road connects Eutsa to other valley settlements, and a secondary school built with Japanese government support stands further up the slope ²³.

The occupation of Bhutan’s high valleys is ancient. Palynological evidence—including the sudden disappearance of juniper and rhododendron pollen and the onset of cereal pollen, alongside an abrupt shift to drier climatic conditions on the Tibetan Plateau around 5000 to 4500 BP—has been linked to human arrival in the high valleys around ca 4280 ± 130 cal a BP, while extensive charcoal horizons dating to 4745 ± 250 and 4680 ± 155 cal a BP have been interpreted as evidence of forest clearance ¹⁸. The high valleys here refer broadly to Bumthang, the three Phobjikha valleys, and the Thimphu, Paro, Wangdi-Punakha, and Haa valleys ¹⁸.

The biography of Tenzin Rabgye, recording his 1692 journey from Paro to Taktsang, documents the settlement pattern and social organisation of the Paro valley in the classical period ⁴⁵. The social structure was organised around militia units that could serve as honour guards for visiting lamas; individual villages maintained their own militia and demonstrated their martial capabilities through ceremonial displays such as gun-firing at Drugyel Dzong ⁴⁵. The text records named communities—the five Lam-gong communities near rGya-gar-thang, the bTsan-gdong-pa militia settlements, and various clusters identified by their militia organisations—and a settlement hierarchy that included headmen (drungpa) and citizens organised into patron groups ⁴⁵. The names “Inner Circle” (nang skor), “Outer Circle” (phyi-skor), and “Middle Circle” (bar-skor) appear to be part of old village-cluster names in the Paro valley, suggesting a territorial organisation based on concentric zones of patronage and allegiance, into which Tenzin Rabgye brought the Lam-gong-pa patrons as the “Middle Circle militia” (Bar skor dpa' rtsal pa) ⁴⁵. The gifts exchanged—gold, silver, horses, oxen, tea, clothing, silk, butter, salt, and cotton cloth—suggest both agricultural production and trade connections ⁴⁵.

7.2.6 Modern regulation and changing rural morphology

Government regulation has reshaped rural settlement form. A 2003 regulation banning animals from the ground floors of residential buildings significantly altered the morphology of both Ura and Eutsa ²³. In Ura it produced makeshift cow sheds at the village edge that lack the structural quality and identity of residential buildings; in Eutsa it led to external stables built next to houses, densifying the originally loose arrangement with additional storage sheds ²³. Former ground-floor stables have lost their original function and remain largely unused, being unsuitable for residential purposes because of their small windows and low ceilings ²³. More broadly, the seasonal occupation of villages such as Eutsa, together with this regulatory non-compliance, accounts for the poor maintenance of many houses relative to current government architectural guidelines ²³. The advent of vehicles also pulled houses away from their tightly clustered historic arrangement toward vehicular traffic ³¹.

---

7.3 The dzong and the emergence of urban form

If the rural landscape is dispersed, the dzong is its concentrated counterpart: a fortified complex that gathers administrative, monastic, military, and residential functions into one structure and acts as the nucleus around which urban form develops. The sources trace a progression from the dzong as a self-contained proto-urban settlement, to the rudimentary market clusters that grew up near dzongs, to the deliberate town planning of the modern era.

7.3.1 The dzong as settlement nucleus and proto-urban form

The dzong is repeatedly characterised as the centroid of administration and settlement—a fortress that functionally serves as the centroid of administration, defence, granary, and monastic and ritual assembly ²². It is a proto-urban form concentrating military, administrative, monastic, and economic functions within a single architectural complex, strategically sited on commanding locations such as river confluences or rocky promontories so as to control territory and settlement ²². As a settlement-generating institution it structures the morphology of the towns and villages around it, which in their larger form acquire monasteries, chorten, mani-walls, prayer water-wheels, and prayer flags ²².

Davis’s account of Tashichö Dzong shows the dzong functioning as a closed institutional community. It served as the administrative and religious centre of the country, housing the Rajah, the principal officers of government, and the Gylongs (fully ordained monks) who formed the governing class, with distinct functional zones: the Rajah’s residence in the central structure, the chapel and priestly apartments in one square, and the officers and servants of government in the other ¹⁶. The Gylongs were not allowed to leave the castle except on every eighth day, when they walked out one by one in order of seniority to bathe in the river, and the gates were closed every evening about dusk—so that the building operated as a proto-urban settlement within the fortress walls ¹⁶. Its administrative apparatus reached out into the territory: the Zeen-Caabs (servants of government) attended the public buildings to ensure that provisions, firewood, and other necessities were supplied by the country people and to superintend public labour, with some serving on deputations to Bengal and escorting the mission, establishing the dzong as the centre of territorial governance and resource distribution ¹⁶.

Denwood notes that the main dzongs incorporate large temples and monasteries which often dominate them physically, housing hundreds or even thousands of monks, yet were obviously built as defensive strongholds and have been besieged a number of times ²⁹. The entrance courtyard of larger dzongs is used solely for offices and storerooms, with monastic quarters set around two courtyards beyond the temple and in a large building at the far end; in Paro Dzong, many of the surrounding rooms—especially on the higher side nearer the entrance—are used as offices for the administration of the surrounding region ²⁹.

White’s description of Poonakha-jong illustrates the dzong as a self-contained urban unit. It is capable of housing 6,000 souls or more, with the Ta-tshang section alone containing approximately 3,000 lamas, and its internal organisation—successive courts with flanking residential buildings, the large Durbar Hall for state ceremonies, the temple for worship, and the lamas' cells—creates a self-contained urban form, while its defensive walls and gateways function as a proto-urban boundary controlling access and movement ³. The surrounding landscape was modified to support settlement: at Poonakha a camp was pitched in the surrounding area, and at Tongsa a new road about one-third of a mile long was made along the hillside to a camp occupying a knoll with fine trees and water, described as “the pleasaunce of the castle monks” ³. The dzong thus serves as the nucleus around which administrative, monastic, and lay settlement clusters, producing a proto-urban form distinct from the dispersed rural villages ³.

7.3.2 The morphology of historic centres and markets

The sources find little evidence of developed market or commercial centres in historic Bhutan. Towns scarcely existed until recently, the nearest thing to a town being the tents and huts of traders and market stall-holders near the larger dzongs ²⁹. White’s account confirms the absence of a distinct commercial morphology: Poonakha is identified as the capital, with the dzong as its primary architectural feature; the entry into Poonakha is marked by a choten built at the junction of two valleys, commanding a picturesque view of the castle, and a bridge across the Mo-chhu under a salute of guns ³. The dzong itself functioned as the administrative and ceremonial centre, with the Durbar Hall serving for state ceremonies and the reception of officials, and the surrounding settlement clustered around the dzong rather than forming a distinct market or commercial district ³. White’s source does not provide sufficient evidence to characterise the morphology of historic market centres or commercial streets in Bhutanese towns ³.

7.3.3 Modern town planning and urban design

The modern era brought the first true towns and, with them, deliberate planning. Denwood records Bhutan “moving into the twentieth century”: after a few disastrous experiments with concrete huts, its building programme was based entirely on traditional lines ²⁹. The outstanding example is the new Government headquarters and Royal Secretariat at Thimphu—a huge dzong, modelled around the pre-existing temple of Tashichodzong, completed to house government offices and so faithfully traditional in every detail, built by traditional methods and by ordinary craftsmen and labourers unaided by mechanical tools, that once the newness wore off it would be hard to tell its age except by its glazed windows and electric lighting ²⁹. Great use was being made of a traditional though hitherto uncommon type of building, the wood-framed bungalow: a rectangular wooden construction using the same techniques as the upper storeys of farmhouses, its panels filled with daub-and-wattle that leaves the painted wooden framework visible (in the manner of some Japanese buildings) and its usual pitched roof perched on a flat top ²⁹. Such bungalows could be rapidly erected by slotting components together and resting the building on wooden piles, and later dismantled if necessary; they were being built in large numbers as offices, especially around Thimphu, and their ancestors were perhaps the guest houses erected near some of the main dzongs ²⁹.

Thimphu had by then become “a town of sorts,” for which a special type of shop building was designed, again using native Bhutanese building elements in a new arrangement that provided a ground-floor showroom; the remainder of the town was largely single-storey wooden dwellings arranged haphazardly into residential areas ²⁹. These dwellings left something to be desired, yet were far superior to the precariously built shacks that cluster around the capitals of most developing nations—soundly built of good timber, often incorporating traditional trefoil-shaped windows, and roofed with traditional timber roofs weighted down with stones ²⁹. Denwood concludes that Bhutan is outstanding among developing countries in the use it makes of its own cultural heritage in architecture, and that, if the trend continues, it will soon be the only country in Asia with a distinctive living tradition of building ²⁹.

Walcott describes the later, formalised phase of urban planning as a deliberate synthesis of Western planning principles with local cultural and environmental constraints ⁵⁰. The Thimphu Structural Plan (2002–2027), overseen by an American planning consultant, incorporates concepts termed “intelligent urbanism,” similar to “smart growth,” envisioning clustered, densely occupied village-type nodal neighbourhoods within the larger city connected by public transportation ⁵⁰. The plan assigns key urban roles to traditional political and religious sites, with the most important dzong seat of traditional power, Tashichodzong, remaining a ceremonial centre alongside particular chortens that continue to serve as ceremonial centres of the city ⁵⁰.

The physical topography of the valleys imposes significant constraints on urban morphology: Thimphu’s strung-out form necessitates the integration of outlying settlements through overbounding policies, with subsumed districts preserving the hamlets' names and locations, and a visible growth boundary imposed by both topography and political strictures aimed at arresting environmental degradation ⁵⁰. Land “pooling” represents a major transformation in landownership and urban form-making: under a government-enforced scheme, registered owners in targeted areas are required to turn over up to one-third of their parcels at government-set prices, with the pooled areas earmarked for widened roads and nodal centres for retail, educational, or other concentrated activities—uses that remain unclear to the public—while landless people, or those rendered landless by pooling, frequently receive allocations in southern areas depopulated by disturbances, equalising population density ⁵⁰.

Thimphu’s internal structure exhibits a sectoral division originally proposed by British-influenced Indian planners in the 1960s, when the city began to take shape as a functioning city aided by Indian planners and funding; a 405-hectare plot was divided into areas for residences, schools, a modern hospital with a centre for traditional medicine, and a retail service strip ⁵⁰. This sectoral pattern is most apparent in the economic districts: the woodworking sector concentrates in a recently incorporated village east of the core, while a large “Auto City” cluster currently within the central district is slated to move to a new area taking shape in the southern metropolitan outskirts, with rent-subsidised housing and apartments for workers in these occupations under construction where villages formerly stood, close to the near-capacity sewer-water treatment plant ⁵⁰.

---

7.4 Infrastructure and engineering works

Bridges, water systems, and roads are the engineering works that connected an otherwise fragmented mountain territory. The sources treat them both as practical responses to a difficult hydrology and terrain and as undertakings bound up with religion, trade, and state labour obligations.

7.4.1 Bridges and crossing technology

Bridges were indispensable. Bhutan’s internal mobility and trade depended fundamentally on them, crossing ten narrow river basins separated by north–south mountain barriers; the rivers discharge approximately 71 million cubic metres of water annually—about 2,238 cubic metres per second—with flows varying dramatically across seasons, a reality that necessitated diverse bridge types adapted to local conditions ⁵¹. In a country of mountains and torrents, the traveller commonly passed one bridge in every day’s journey ⁶.

The typological range was wide and matched to materials and terrain ⁵¹⁶:

• Tree-trunk overlays (kangzam) spanned narrow gorges; where the width of a river allowed, timbers were simply laid horizontally from rock to rock ⁵¹⁶.
• Stone slab crossover bridges were used in highland areas ⁵¹.
• Cane ropeways and suspension bridges (tsharzam) served tropical zones ⁵¹. A curious simple bridge for single passengers consisted of two large ropes of twisted creepers stretched parallel and encircled with a hoop; the traveller sat on the hoop, seized a rope in each hand, and slid across the abyss, saving a laborious journey of several days ⁶.
• Timber-truss structures (bazam)—a shortened form of basozam—employed trusses resembling layered elephant tusks to support the deck ⁵¹. Over broader streams, a triple or quadruple row of timbers, each projecting over the one below and inserted into the rock, sustained two sloping sides united by a horizontal platform, so that the centre was raised well above the current and the whole formed nearly three sides of an octagon; piers were almost entirely excluded because of the unequal heights and extreme rapidity of the rivers ⁶.
• Iron chain bridges (chakzam) were the most sophisticated type ⁵¹. The widest river had an iron bridge of several iron chains supporting a matted platform: the chain bridge called Chuka cha-zum, stretched over the Thinchu above the castle of Chuka, was about 150 feet long, some 35 feet above the water at its lowest point, and 5 feet broad; only one horse was admitted at a time, and it swung as one trod upon it, the five supporting chains carrying loosely laid layers of coarse bamboo mats with a fence of the same material on each side ⁶. The longest and most celebrated iron chain bridge crossed the Drangmechu below Kengkhar ⁵¹.
• Bamboo rafts tethered to rattan cables served southern frontier crossings where river mouths became too wide for conventional spans ⁵¹.

Iron chain suspension bridges are especially associated with the saint Thangtong Gyalpo (1385–1464 or 1361–1485), known as Lama Chakzampa, who pioneered their construction in Bhutan and across the Himalayan region, building more than 52 such bridges in his lifetime, over 10 of them in Bhutan ⁵¹³⁶. These bridges served both religious and economic functions, providing pilgrims access to monasteries and sacred sites while safeguarding transit on the major east–west and north–south caravan routes ³⁶. Documented examples include the Chung Riwoche Chakzam, spanning about 60 metres across the Yarlung Tsangpo roughly 100 kilometres upstream from Lhatse and 50 kilometres from Thangtong’s birthplace at Rinchen Ding, which secured access to the Chung Riwoche Kumbum shrine and protected the major east–west connection in Tibet; the Phuntsholing Chakzam about 50 kilometres downstream of Lhatse, giving access to Phuntsholing monastery and the Jonang Chorten; the Rinchen Chakzam across the Kyichu north of Lhasa, allowing access to the monasteries of Reting, Taglung, and Drigung and serving the north–south road from Sining and the Kokonor; and the Tholing Chakzam, protecting access to the Western Tibetan kingdom of Guge with its monastic cities of Tholing and Tsaparang by crossing the Sutlej in a narrow gorge where torrential flow made ferry crossing impractical, so enabling pack and riding animals to cross terrain otherwise passable only by single rope bridges requiring manual hauling ³⁶.

The construction of these bridges involved substantial engineering. Abutments required substantial earthwork and masonry; pillars were built from wackestone quarried at the site, reinforced with timber frameworks, and in major installations incorporated breakwaters and icebreakers to manage seasonal floods and ice drift—the Chung Riwoche stream pillar, for instance, featured a 15-metre upstream breakwater and icebreaker built in the same construction as the pillar ³⁶.

White records bridges as significant infrastructure, photographing specific examples and noting historical continuity by comparison with Turner’s sketches of 130 years earlier; the timber bridges show the application of structural principles and aesthetic sensibility to utilitarian infrastructure, and White’s own background as an engineer and his role in establishing “roads and bridges” in Sikhim point to the integration of infrastructure development with architectural practice in the region ⁸.

7.4.2 Iron mining and metallurgy

Bridge-building rested on a domestic iron industry. The sources record that Thangtong Gyalpo brought large quantities of iron from Bhutan to Tibet for bridge construction, smelting iron in the Paro and Thimphu regions; different figures are cited—1,084 “plums” of iron transported to Phari Dzong, or 7,500 horse loads transported from Paro to Tibet—indicating substantial logistical organisation for material supply ³⁶⁵¹.

Iron extraction and smelting in Bhutan predated Thangtong: Pema Lingpa (1445–1521) subsequently smelted ores at multiple sites in central Bhutan, with tangible evidence surviving in Tang and in the Nabji rice terraces ⁵¹. At least three major iron-mining sites are documented—Chakola above Genyenkha near Thimphu, the northern foot of Tashigang castle at Khaling, and the hills below Tashiyangtse—and slag heaps and bloom deposits scattered across the country indicate that ferrous metallurgy was not a rare activity ⁵¹. Spruce wood fuelled the smelting process at Chakola, whose mines remained active until the mid-1940s, supplying iron for implements and weapons, particularly swords and daggers forged in Wochu, Paro—a vocation enshrined in the saying “the iron smiths of Wochu, and the wool processers of Chaang” ⁵¹. The Chakola mine shafts, bored to considerable depths—potentially hundreds of feet—were accessed by rattan cables, with miners descending into underground workings where surface communication occurred through cable signals rather than audible calls ⁵¹.

Iron production was tied into the tax system. Genyenkha households held tax obligations based exclusively on iron production and transport: each of the nine households in Genyenkha village, and others in the gewog, delivered annually three pieces of hentshoy togtsi (spades for spinach gardens), two blocks of loongku (iron blocks with hooks), eight pieces of chabu ochu (iron spoons), and several bags of chagngaap (red ochre powder for dzongs, temples, and elite residences)—the extracted ore being yellowish but oxidising to red ochre ⁵¹. The iron blocks and implements were transported as backloads to Jatsa dzong and thence to Wangdicholing and Lame Gonpa in Bumthang, where branches of the royal family had resided since the turn of the nineteenth century; the iron taxes on the Genyen people were eventually abolished after the tenure of the last dungpa of Genyenkha, Paro Dobu Karchu ⁵¹.

7.4.3 Water infrastructure: supply, milling, and the prayer wheel

Water management was an integrated engineering system serving households, monasteries, agriculture, and ritual.

At the domestic scale, water was fetched every morning to fill a cauldron from an outdoor wooden water pipe fed from a water prayer wheel or a springhead; the pipes were assembled from wooden troughs, grooved tree trunks, or lengths of bamboo, each piece lapped over the next to channel water over long distances ²⁵. The water prayer wheel itself consisted of a load of mantras rolled tightly into a cylinder and bound in hide, mounted on a wooden spindle turned by water beating on a wheel; the water that rotated the wheel was supposedly purified, and the water spout of the prayer wheel was one of the most frequented places of meeting and talk, where people gathered daily to collect water and wash ²⁵.

The same hydraulic principle drove the water mill: the force of a rivulet was harnessed to power a mill for flour, its wooden fins, shaft, axle, and headrace exactly similar to those of a water prayer wheel, except that grinding stones and a flour bowl replaced the cylinder of mantras, with a hopper for grain suspended above ²⁵. The rotation was gentle—only about five kilograms of parched barley, wheat, or maize could be ground into fine flour per hour—so that people slept overnight in the mill when there was a large amount of grain to grind ²⁵.

White records the agricultural and structural sophistication of water management: cantilever bridges carried large wooden channels with water streams to irrigate rice-fields on the opposite bank, and the Bhutanese were noted as remarkably skilful in laying out canals and irrigation channels and in overcoming steep, difficult places through bridges or masonry aqueducts built to considerable heights ³. Water management also served defence and timber supply: at Tashi-cho-jong, just below the bridge across the Tchin-chhu, a wooden structure was cleverly designed to catch timber floated down the river from distant hills for use in the castle; forts built on ridges employed sunk passages zigzagging down to the valleys, protected by towers at each turning, to ensure a water supply under siege; and together with the fosse-filled defensive moats and irrigation channels, these works formed a unified engineering system integrating defence, water access, and agricultural productivity ³.

Within fortresses, water supply was a major logistical burden. Water pipes were introduced into the fortresses where officials and monks were concentrated, and whole villages existed in the neighbourhood of the fortresses whose primary tasks included hewing wood and fetching a vast quantity of water for the dzong from outside ²⁵. In dzong construction, run-off from roofs and courtyards was carefully channelled out so that the foundation and walls would remain as dry as possible; later, the introduction of tap stands at multiple points combined with poor plumbing adversely affected most structures through leaks and overflows ²⁵.

Modern piped water arrived in the later twentieth century. Rural piped water supply was first started in 1974, the year of the Fourth King’s coronation; the tap stands installed since then were mostly communal and shared, with one tap stand for every six households, and community members took turns to maintain the sources, tap stands, tanks, and pipelines as had been done with communal facilities in the past ²⁵. The schemes were designed by considering both daily supply and daily demand, to ensure that daily supply was greater than daily demand ²⁵.

7.4.4 Roads, trails, and their maintenance

Roads and trails were engineered against extreme terrain. Early accounts describe the road leading by the river along the mountainsides with few inequalities and easy stages of about eight miles, and the ascent to Choka as a narrow zigzag path of about four miles, climbing through wood and past springs, waterfalls, and “grand natural amphitheatres” ⁶. The road along the side of a very high mountain ran in a serpentine and exceedingly steep direction, the ascent almost all the way by stone steps, which in some places were sustained only by beams let into the rock and secured with cramps of iron; the rivers and torrents swelled in the rainy season, but the roads were rarely impassable except briefly through the demolition of a bridge or a slip of earth, which was soon repaired ⁶. White likewise records a road system of well-aligned paths with portions paved and soft places corduroyed with flat timber (as on the Pele-la), and steep zigzag paths with many flights of stone steps leading to Tongsa-jong as engineered solutions to extreme terrain ³.

Maintaining this network was a significant infrastructure obligation. Villages situated at trail junctions bore a customary responsibility to transport official baggage across their stretches and to maintain the trails—widening them along cliff-faces, clearing rockfalls and debris, and seasonally rebuilding river crossings destroyed by flood ⁵¹. A national survey of unpaid labour contributions in 2005 recorded approximately 22 days annually per household for such facilities, though historical obligations would have been substantially higher ⁵¹. The hazards were real: pack animals regularly missed their footing under standard 60-kilogram loads when overhanging cargo struck rocks or wood, causing falls down cliffs, and crossing tree-trunk bridges with large backloads was especially dangerous, since the oscillation induced by a single traveller could throw an unbalanced carrier off, while a second traveller’s footsteps either dampened or amplified the oscillation depending on step placement ⁵¹. The biography of Tenzin Rabgye similarly notes that the journey required infrastructure such as the “Bridge at the Water Parting” (Chu-'gyed-zam-pa), where he dismissed his bodyguard ⁴⁵.

7.4.5 Modern infrastructure: hydroelectricity, roads, and traffic

Modern infrastructure development reflected both practical necessity and cultural values. A small hydroelectric facility was installed at the edge of Thimphu by Indian engineers to supply the city’s electricity, following a pattern that became typical of electricity provision in Bhutan ⁵⁰. The gradual construction of a road network primarily served the urban population and economic uses, extending from the sole airport in Paro to nearby Thimphu and Phuntsholing; the government recognised the importance of roads but, committed to building them in an ecologically careful and inexpensive manner, relied on painstakingly slow and largely manual labour by Indian work teams under Indian supervision, which delayed the development of domestic trade routes ⁵⁰.

Vehicular traffic infrastructure in Thimphu reflected distinctive local choices. Streets were widened, extended, and paved in preparation for the November 2008 coronation; traffic lights installed downtown were quickly removed by command of the king out of concern about the average person’s unfamiliarity with the colour-coded system, with the result that Thimphu remains the only capital city in the world where traffic is directed solely by policemen ⁵⁰. Inexpensive public buses ply the main routes and housing concentrations, complemented by taxis and motorcycles, and a GIS-based analysis of bus-route coverage indicated that few pockets lie beyond walking distance, although the buses are reportedly infrequent and often delayed, discouraging ridership ⁵⁰.

8 Conservation of the Built Heritage

The final section addresses the physical care of the fabric whose forms, making, types, history, and setting the preceding sections have described. Its subject is conservation in the broadest sense—the pressures that threaten the built heritage, the philosophy that should govern its treatment, and the institutions, documentation, and craft on which its survival depends. The section is framed by a question peculiar to Bhutan: how a culture in which renewal and impermanence are religiously sanctioned, and in which most monuments remain in active use, can be reconciled with international doctrines of material preservation and authenticity. It begins by surveying the threats to the physical fabric, from sudden natural hazards through slow material decay to the diffuse effects of modernization and the deliberate practice of renewal (8.1). It then sets out the question of conservation philosophy and authenticity, tracing the tensions—and occasional reconciliations—between indigenous attitudes and external principles (8.2). The middle chapters describe the apparatus through which conservation is actually carried out: the national institutions, legislation, and international partners that constitute the heritage system (8.3), and the documentation and inventory practices treated throughout the sources as the foundational conservation act (8.4). The section then turns to restoration, repair, and post-disaster reconstruction as both administrative process and technical practice, illustrated through major case histories (8.5), and concludes with the issue on which long-term success ultimately rests: the continuity of the building crafts and the sustainability of conservation practice—at once a distinctive Bhutanese strength and a point of acute vulnerability (8.6).

8.1 Threats to the physical fabric

The built heritage of Bhutan is exposed to a wide range of pressures, from sudden natural disasters to slow material decay, and from deliberate cultural practices of renewal to the diffuse effects of modernization. These threats operate on dzongs, temples (lhakhangs), monasteries, chortens, prayer walls, vernacular farmhouses, wall paintings, and buried archaeological remains alike.

8.1.1 Natural hazards: earthquakes, fire, and water

Seismic activity. Bhutan lies within a major seismic belt, and earthquakes are described as a constant and unavoidable threat to its buildings; most structural weaknesses in buildings have been attributed to earthquake movement ^5,14,17. Documented seismic damage includes the 1897 earthquake, which destroyed the original tower at Tashi-cho-jong entirely, shook large strips of plaster from frescoes at Punakha, and damaged Angdu-phodang ³; the 1981 earthquake at Tamchog Lhakhang (compounded by blasting during construction of the Paro–Chusom road); the 1987 earthquake at Tongsa Dzong; and the 1990 earthquake, which severely damaged Risum Gompa ^14,9. The earthquake of 21 September 2009 in eastern Bhutan caused extensive damage to four dzongs (including important wall paintings in Lhuentse Dzong), 36 chortens, and 31 lhakhangs ¹⁷. Earthen secondary supports for wall paintings are prone to buckling and cracking under uneven loading or structural movement ¹⁷.

Fire. Fire is a recurrent and historically destructive hazard, aggravated by timber construction, split-wood shingle roofs that are easily set alight, the lighting of butter lamps during funerary and other rituals, the use of wood-burning stoves in ancillary monastic buildings, and electrical faults ^3,17,43. Documented fires include Drukgyel (Drugyel) dzong, ruined by a butter-lamp fire in 1951 ^43,9,38; Paro dzong, rebuilt after a disastrous fire in 1906/1907 ^43,9,38; Haa dzong, left partially ruinous after a fire in 1913 ⁴³; Punakha dzong, damaged by fires (recorded in 1332, 1986, and 1986 again) ^9,4; Gasa dzong, until recently the least altered of the Shabdrung’s monastic fortresses, ravaged by a disastrous fire ⁴³; and Wangduephodrang Dzong, razed by an electrical fire on 24 June 2012 ¹⁷.

Floods and water erosion. Flooding and riverbank erosion threaten waterside structures. A 1960 flash flood seriously damaged the ta dzong barbican at Punakha ⁴³; floods in 1968 destroyed the unique cantilevered fortified bridge of two spans crossing the Punatsang river at Wangdue Phodrang ⁴³; the traditional bridge below Tongsa dzong was washed away in the 1991 floods ^5,9. Chörten Kora is endangered by erosion of the riverbank, where the Kulong-chu and Bersam-chu streams undermine the embankment; a major flood in August–September 1984 overflowed the left bank, and erosion continued despite protective measures ^14,9.

8.1.2 Material decay and structural deterioration

Beyond catastrophic events, the fabric is subject to chronic decay arising from water, biological agents, and constructional weakness.

Damp and water management. Old buildings lack a damp-proof course and are susceptible to rising damp, which can disintegrate the basic structure and carries earth salts that recrystallize beneath internal plaster, causing irreparable damage to murals ^14,5. Rainwater is evacuated through large overhanging roofs and drains whose outlets discharge above ground level on the outer façade, damaging wall bases; drainage along external walls and in courtyards is generally poor ⁵. At Tamshing Lhakhang, driving rain penetrates the walls through mud mortar and deposits soluble salts beneath the paint layer, causing detachment, disaggregation, and loss; outside ground levels higher than interior floor levels promote rising damp, notably in the circumambulatory corridor around the Guru Khang ¹⁰.

Roofing failure and roof-water. Poor roof condition is described as a problem besetting almost all buildings; very few have a watertight roof ¹⁴. Traditional wooden shingles require replacement roughly every three years, and leaks arise where the pitch is insufficient or shingles are badly prepared; the absence of guttering lets water cascade directly from roof edges ^32,33. Rainwater from unmaintained roofs disfigures wall paintings through partial solubilisation and redeposition of earthen supports and glue-bound paint layers ¹⁷.

Fungal and insect decay. True dry rot (Merulius lacrimans / Merula lacrimans) is identified as the greatest danger to all timber, developing where ventilation is lacking, temperatures are moderately warm (about 20–30 °C), and moisture content is moderate (about 20–25 per cent) ^14,5. Wet rot affects timber ends built into wet walls, floors and pillars in contact with the earth, and areas of localized roof leaks ¹⁴. At Buli Monastery, the bases of the ornamental columns (Kachens) were severely rotten, with lack of air circulation and dampness identified as the main cause of wood-rotting fungi; structural members had failed through decay while ornamental parts remained intact ¹³. Woodworm and water infiltration rotted ceilings of the upper floor at Tamshing ¹⁰.

Constructional weakness in rammed earth and timber. Rammed-earth (pisé) buildings suffer delamination, in which inner layers split from outer layers as rainfall erodes the exposed wall and reduces its thickness; lime finishes do not fully prevent this ³⁴. Wind storms damage roofs at weak rafter–tie-beam and purlin–rafter connections, blowing roofs away where they are inadequately tied to the structure; putlog holes (scaffolding-pole holes) become origins and paths for major cracks; and poor practice — weak formwork, inadequate ramming between lifts, poor timber-to-earth bonding — predisposes walls to cracking and instability ³⁴. The perception that traditional rammed-earth buildings are no longer suitable itself threatens the survival of the technique and the cultural landscape ³⁴. At Dechenphug, inadequate foundations caused settlement of central posts, cracking a timber-framed cloison and inducing sagging of upper-floor beams and posts, while the c. 1960 service building had cracking pisé walls and a decaying, partly dismantled roof ¹¹.

Material vulnerability of wall paintings. Delamination — separation of paint layers from substrate — is a primary conservation concern, detectable by ground-penetrating radar; proteinaceous binding media (identifiable by DNA analysis) may degrade and compromise adhesion; and plaster substrates of argar mud and earth materials are subject to moisture infiltration, salt crystallization, and biological colonization ¹⁹. Organic glazes and coatings deteriorate through exposure to air and light, darkening and losing translucency until paintings appear devalued, opening the way to neglect and destruction ¹⁷.

Maintenance failure, neglect, and theft. Lack of regular maintenance affects the majority of Bhutanese monuments ¹¹. Historically, Pha-ju-ding (Phajoding) monastery — once among the richest houses in Bhutan — had fallen into disrepair with most of its ornaments stolen or lost, and the impoverishment of the country gave little encouragement to the old race of craftsmen ³. Choedrak monastery, despite its spiritual and architectural significance, has struggled to obtain funding even for general maintenance while its neighbour Tharpaling has prospered, and the lack of rigorous research and documentation has left it and other monasteries off the radar of government and scholars ¹².

8.1.3 Loss of fortress character and historic function

As dzongs lost their military role over the last 150 years, their martial architecture has been progressively lost through rebuilding after earthquake or fire; new dzongs are built without fortification, and original wooden shingles have been replaced with galvanized tin ²⁸. The twentieth-century shift from tax collection in kind to cash payments eliminated the need for the large basement storage chambers once required for siege provisioning ⁴². Modern administrative needs have driven extensive rebuilding: Tashichö dzong in Thimphu was extensively rebuilt in the 1960s — completely renovated and enlarged by King Jigme Wangchuk between 1962 and 1969 — gaining large new office wings with extensive windows in the outer walls and losing its fortress role and military architecture ^42,43. With each post-disaster rebuilding, more defensive architecture has been lost, and in some cases an original dzong has been demolished and replaced by a modern building, albeit in traditional Bhutanese style ⁴³. (Comparatively, in Tibet the administrative role of dzongs collapsed after the Chinese takeover, and several thousand temples and many dzongs were demolished during the Cultural Revolution; attempts to demolish the ancient stone towers of Kongpo failed because of their solidity, and the only dzongs remaining are the Potala and the museum-converted ruins of Gyantse ⁴².)

8.1.4 Modernization, development, and material substitution

Roofing substitution. Historic buildings have one by one been re-roofed with corrugated iron, cement-asbestos sheeting, or slates, replacing traditional pine-shingle roofs; when traditional roofing is replaced the original roof shape is seldom respected, altering water-shedding and compromising drainage ⁵. The shift to corrugated tin (chasho, lcags shog) is driven by maintenance burden, cost, and forest-conservation policy: although larch suitable for shingles (shinglep, shing leb) grows in higher regions, legislation protecting forest resources prohibits cutting without permission, and the cost of harvesting, processing, and feeding helpers discourages shingling — by 2014 all roofs in Eutsa but one had been converted to tin ²³. Though ecologically preferable to frequent shingle replacement, the substitution is a material and aesthetic departure that alters the visual character of the built environment and introduces foreign thermal and maintenance characteristics ^32,33.

New materials and forms. The introduction of concrete is a material rupture: even when concrete is painted in “Bhutanese style,” the surface treatment cannot mask the incompatibility between the material and a formal language developed in timber, stone, and earth; the fashion for large glazed bays and verandas poorly suited to the climate signals a weakening of the coherence between form, material, and environment — though development under the concept of Gross National Happiness holds that projects disrupting traditional beliefs or the environment may be slowed or stopped ²⁶. Modern materials such as GIC sheets and cement-asbestos plates create waterproofing failures and accelerate decay of the underlying timber ⁹. Inappropriate alteration is itself a threat: at Tamshing the owners' plan to enlarge the daily-worship room adjoining the oldest part of the temple would disrupt structural equilibrium and destroy the pristine murals ^14,9.

Development pressure, tourism, and the loss of free labour. Development, tourism, and industrialization are converging on formerly pristine environments ²⁴. Until recently buildings were constructed through communal obligations using virtually free labour and materials; in the new commercial economy, building in the traditional style with authentic materials and old levels of skill is generally too costly, and convenience and economy increasingly become the sole considerations, producing rapid degradation of tradition and the environment ²⁴. Where settlement siting was once governed by “natural” laws or necessity, placement is now determined by ownership patterns, what is for sale, and access to roads and electricity laid for other purposes, producing scattered, formless development; Thimphu is cited as consuming a maximum of land in random development that will eventually require excessive municipal cost, and the flood of uncoordinated new buildings serving tourism is described as perhaps the most unfortunate aspect of the transformation ²⁴. Unsanctioned construction has modified sites — a cafeteria and a two-storey building with car park at Paro dzong, and police stations, radio stations, schools, staff quarters, and forest offices built around dzongs that spoil the environment and do not respect tradition ⁹. Continued valley-bottom settlement and agriculture, together with the urban expansion of Thimphu, threaten archaeological and architectural heritage and obscure evidence of pre-seventeenth-century settlement, compounded by alluvial burial and erosion of high-valley sites ¹⁵. Daily use of dzongs, monasteries, and temples for ceremonies, schools, and lodging produces overcrowding, insufficient light and ventilation, poor heating, and inadequate sanitation; living quarters are subdivided with partitions and windows blocked with inflammable material; haphazard power lines, leaking water tanks and pipes (polyethylene piping increasing damp), non-existent waste disposal, and unprotected electric wiring create fire hazards; and some remote hermitage lhakhangs are being deserted because they are too far from modern amenities ⁵.

8.1.5 The culture of renewal and the loss of wall paintings

A distinctive and, in the view of several sources, gravest threat arises from cultural attitudes toward renewal. The obliteration of wall paintings through reconstruction has proceeded steadily, provoked either by ambitious rebuilding rather than sensitive repair, or by deteriorating mud-plaster backing; modernization has accelerated this, owing to limited bureaucratic imagination about restoration and a preference for the new ³⁹. It is commonly assumed that new support materials and industrial pigments simply continue a vigorous “living tradition,” with the corollary that preserving the art of the past is pointless or — within a Buddhist framework where merit is gained by sponsoring new construction and decoration — even counterproductive; as long as such ideas prevail, renewal and replacement remain perhaps the greatest threat of all ¹⁷.

Specific losses include the early frescoes of Changangkha (Changankha) Lhakhang in the capital — eight planetary bodies, three nagas, and twenty-eight constellations, possibly dating to Phajo Drukgom Zhigpo’s period (1208–1276) and esteemed among the earliest in Bhutan — completely replaced by unrelated paintings in the early 1990s under the Ministry of Home Affairs ³⁹; described elsewhere as the thirteenth-century scheme in the goenkhang, with unique cosmological iconography, replaced in the 1990s by a generic modern scheme painted on cloth, known now only from a handful of photographs ¹⁷. The exceptional Gangtey Goenpa scheme of c. 1682 — incorporating the Guardian Kings of the Four Directions, extensive texts, and an extremely rare Jang Shambala, with lavish materials including orpiment in the ground layer and unique selective coatings — was largely destroyed in 2001 during an ambitious renovation ¹⁷. A survey of paintings at Bhutan’s most ancient sites found the majority painted on cloth and dating from the 1830s onwards, indicating that the zeal for renewal dates from at least that period; very few pre-Zhabdrung (pre-seventeenth-century) wall paintings survive intact, and in all likelihood no fresco wall paintings a thousand years old remain, since immovable frescoes could not be saved when walls disintegrated ³⁹. “Ill-judged and ill-informed painting restoration,” “injudicious cleaning interventions,” and “unsuccessful detachment of paintings” have all proven harmful ³⁹. The fulfilment of the desire for pristine new decoration is increasingly enabled by efficient transport, affordable mass-produced materials, and donations from foreign charities ¹⁷. A parallel danger is the rise of heritage conservation by non-governmental organisations for whom wall painting is not a core mission: in the worst cases unskilled, inexperienced paying volunteers are enlisted, foreign “experts” have little knowledge of local traditions, and local “trainees” with no conservation background do much of the work unsupervised and are then encouraged to “teach” others — an extremely dangerous trend given the subtlety, fragility, and rarity of these paintings ¹⁷.

8.1.6 Regulation, migration, and the socioeconomic context

Government regulation has itself reshaped the vernacular fabric. The 2003 ban on keeping animals on the ground floors of residential buildings produced underutilized spaces (small windows, low ceilings) unsuitable for living, and hastily built external cow sheds that lack structural quality and the identity of residential buildings, densifying the once-loose settlement arrangement and diminishing visual coherence ²³. Rural–urban migration has left many houses occupied by older couples or single people, with children studying or earning money in Bhutanese cities, India, or abroad; without remittances the rural economy would suffer, creating vulnerability in the maintenance and continuity of domestic practice ²³. In Phobjikha Valley, seasonal migration means most houses are temporary residences, resulting in poor maintenance, neglect, and non-compliance with architectural guidelines ²³.

8.1.7 Threats to archaeological and minor heritage

Prehistoric burial sites in Phobjikha, Tang, and Bangtsho — of potential bio-archaeological significance from the period before cremation became the main means of disposing of the dead — are vulnerable; one burial ground was destroyed between January 2006 and November 2011 during construction of a new temple, and the culture of cremation has left little bone-archaeology, so the significance of these sites remains unexamined ¹⁸. Prayer walls and associated structures are also endangered: the Mani Dangrim represents an endangered heritage, with documented vandalism and deterioration; at the ruined village site of Jamkhar near Trashigang old chorten structures have been recently vandalized; prayer walls elsewhere show advanced dilapidation; and heavy protective whitewash, common to these inscriptions, obscures texts and impedes study and decipherment ⁴⁶.

8.2 Conservation philosophy and the authenticity question

Conservation in Bhutan cannot be understood through Western preservation doctrine alone. The sources document a distinctive indigenous attitude to the building, shaped by Buddhism and by the modern project of national identity, and they trace the resulting tensions — and occasional reconciliations — between this attitude and international conservation principles.

8.2.1 Impermanence and the tradition of renewal

Bhutanese dwelling culture has no tradition of architectural preservation comparable to the movement that arose in Western Europe from the nineteenth century onwards. From the standpoint of Buddhism and Bhutan’s long quest for national identity, there were no grounds to preserve state-religious architecture merely as part of a “national inheritance.” The Buddhist doctrine of the impermanence of all modes of existence never associated buildings with eternity: like other material culture, architecture is subject to the cycle of construction, demolition, and re-erection (samsara). Through literally deconstructing and reconstructing most of its architectural heritage — including historical monuments such as dzongs — Bhutanese culture treats continuous renewal as its very tradition. From a Western “conservationist” and “monumentalist” viewpoint, the complete demolition and reconstruction of the old Machen Lhakhang and Kunre at Punakha Dzong appears to erase a whole historical chapter; for the Bhutanese it confirms architecture’s impermanent status and serves as a built sign of protection marking a new phase in the country’s assertion of identity. The reasons that may justify intervention extend well beyond “restoration” and “renovation” — practical, technical, socio-political, cultural, religious, and cosmological considerations may all contribute simultaneously, without clear hierarchy ⁴.

Within this frame, restoration in Bhutan is an ongoing tradition rather than museum conservation: the dzongs remain “vibrationally alive” as functioning religious and administrative centres, and rebuilding (as with Punakha) has characteristically made them more impressive, even as their fortress appearance gives way to a more residential one ⁴².

8.2.2 “Beautification,” improvement, and the conflict with development

In Bhutanese understanding, conservation is not only repair and the maintenance of visible remains of the past but also “beautification” and improvement through modern facilities — water supply, sanitation, heating, electricity, expanded space for religious dances, shelter for tourists during festivals ⁵. When major repairs are undertaken, modern improvements such as fire walls and anti-earthquake reinforcements may be added where applicable, and district administrations, as modern organizations, need expanded office space and better lighting ⁵. The central challenge is to balance the preservation of historical and artistic integrity with a legitimate desire for modernization; restoration carried out spontaneously and in an uncoordinated way has been less successful than the situation merits, and a defined procedure for conservation practice is needed ⁵.

The reconciliation of rapid economic and social development, tourism, and heritage preservation is a problem common to many developing countries, and the conflict between development of basic infrastructure and the wish to preserve cultural and natural heritage is not easily reconciled ¹⁴. A purely “nostalgic” approach that obsessively reproduces old models in every detail and ignores innovative materials and technologies risks rendering tradition “non-adaptive,” carrying an underlying danger of rigid conservatism that denies tradition the dynamism and flexibility it needs to survive new challenges ¹⁴. In Bhutan, culture is in the hands of people whose knowledge is embedded in a tradition they may regard as permanent, while decision-makers react with modern attitudes, so the two approaches are often antinomic — yet Bhutan can be an example where culture and change become a mutual challenge ¹⁴.

8.2.3 International doctrine versus local practice: the Dechenphug case

The Dechenphug conservation project (1996–1999) exposed a fundamental divergence between international conservation doctrine and local Bhutanese building practice, centred on authenticity and “historical depth.” UNESCO’s position, grounded in the Venice Charter and international conventions, held that monuments derive value precisely from the evidence of their age and the layering of their past, opposing the “impetuosity of reconstructors.” Local authorities, by contrast, understood monuments as living structures, modified and enlarged over centuries and so perpetually susceptible to transformation. Their initial proposal — to conserve only the utse tower and reconstruct the other buildings at a new location to enlarge the court and “clear the view toward the utse” — reflected this understanding, but the justifications appeared unconvincing: circumambulation did not require such reconstruction, which was instead motivated by a wish to accommodate festival dances that had no traditional precedent at this pilgrimage site; and “clearing the view toward the tower” ran against a tradition in which the tower’s summit, visible from afar, is normally hidden at its base by peripheral construction and revealed in full only from within the court ¹¹.

The conservation team recognized a coherent cultural logic in the local position: Bhutan’s identity, consolidated over thirty years of selective opening, had already been reshaped by new building types, materials, techniques, and media images; the decision-making process itself had changed, producing degradation of spatial composition threatened by improvisation and pastiche; and the local approach served a unifying cultural policy aimed at preserving Drukpa Buddhist values and building national identity against local particularisms, with architecture an essential factor parallel to the standardization of the Dzongkha language ¹¹. The team also acknowledged that the Venice Charter’s authenticity criterion can appear in Asia as a “profoundly Eurocentric” preoccupation foreign to local sensibility — in India and Burma the vogue for “beautification” perpetuates practices unthinkable in Europe, and meetings often call for a Bangkok or Kathmandu Charter more consonant with local cultures; historical or mythological reference may retain greater force in Asia, where one need not see the wear of centuries on a pavement to feel that Guru Rinpoche or Rama once walked there, even if imported marble now reflects neon light ¹¹. The compromise eventually adopted — conserving the two principal buildings, reconstructing only the service building with modest court enlargement, and completing the perimeter wall for circumambulation — demonstrated that the two conceptions are “not always irreconcilable” and that “it is sometimes possible to take the middle path” ¹¹. The same project also warned against a tendency toward over-elaboration and normalization according to idealized models, exemplified by the replacement of a simple sacred-rock shelter with an ornate pavilion built to strict classical carpentry canons, which risked undermining the diversity and inventiveness of living Bhutanese architecture ¹¹.

A related implicit philosophy appears in the UNESCO survey’s recommendations: that Drugyel dzong be declared a national treasure and preserved as an open-air museum (treating ruins as having heritage value rather than reconstructing them); that Taktsang and its temples and landscape setting be protected as a unified heritage object; that protected perimeters be established and development monitored; and that original form, material authenticity, and original artwork be preserved — though the survey identifies the tension between conservation and use without resolving it philosophically ⁹.

8.2.4 Authenticity in the painted fabric: fidelity of intention versus material consistency

Wall painting poses the authenticity question in an acute form, because the technology of Bhutanese wall painting has never been static. The sixteenth-century scheme at Tamzhing (Tamshing) Lhakhang, completed by 1505, was extensively overpainted in a later intervention (probably eighteenth-century) that was apparently meant to refresh and repair rather than supplant: iconography, sequencing, layout, and the colour scheme of the most important figures were retained, even though entirely different materials were used — organic blue in a white clay matrix with a little cinnabar replacing coarsely ground azurite glazed with translucent organic red, and brilliant green brochantite with sparse cinnabar replacing an indigo-based olive green — both seeking the same visual effect through different palettes ^17,13. Seventeenth-century schemes at Simtokha Dzong and Tango Monastery reveal further evolution (white lead sulphate in the Simtokha ground layer suggesting Ming Chinese influence; independent use of brochantite; lavish gold; sophisticated selective organic coatings), while the nineteenth and twentieth centuries saw a more radical break — cloth supports, industrially manufactured pigments and synthetic dyes, and imported binders — yet adopted energetically as a continuation of an adaptive tradition ¹⁷.

The conservation lesson drawn is that authenticity in Bhutanese wall painting cannot be fidelity to a single, unchanging material system; rather it resides in the coherence of intention — the desire to preserve sacred narrative, cosmological meaning, and visual effect — across changes of material and technique ¹⁷. An appropriate conservation philosophy must therefore distinguish interventions that preserve this coherence (the eighteenth-century repainting at Tamzhing being a model of authentic intervention) from those that destroy irreplaceable specificity (the replacement of the thirteenth-century Changankha scheme with generic modern cloth painting; the destruction of the Gangtey Goenpa scheme in 2001) ¹⁷.

The treatment of over-painting at Tamshing and Dechenphug embodies a parallel principle. Cleaning tests at Tamshing showed that over-painting applied perhaps a century earlier had somewhat protected the original beneath — found in very good condition — while the nineteenth-century white priming layer had altered the original features and surface; the decision to remove over-painting required SCCA approval rather than being automatic ¹⁰. The conservation philosophy kept the building’s religious function in mind, respected the tradition of not having disrupted images in a sacred place, and accepted that a fully detailed image would usually not be recoverable: wear, losses, and abrasions are toned down with watercolour glazes; reconstructable lacunae are filled to paint-layer level and integrated with the tratteggio method so as to be recognizable as contemporary interpretations; deeper lacunae are neutrally toned so as not to disrupt appreciation of the original; and painted architectural elements such as frieze and skirting are integrated to give optical support — balancing recovery of the original with respect for religious function and acknowledgement of later interventions as part of the object’s history ¹⁰.

8.2.5 Authenticity in reconstruction and the case for preserving exemplars

Reconstruction raises authenticity questions of form and function. The rebuilding of Yam-bu-bla-mkhar (Yambu Lhakhang) in the Yarlung valley in the 1980s, after its destruction during the Cultural Revolution, distorted authenticity by reducing the height by one floor, leaving the third floor unbuilt and producing an access arrangement (only by outside terrace and across the roof) that would not have been practical for defence — a departure from historical function and form; and the restored Potala Palace, enlisted as a world heritage site, is said to have lost some of its authentic aura, with paying visitors and remaining monks dressed like museum guards ⁴². While these are Tibetan examples, they frame the Bhutanese debate. Against the prevailing logic of renewal, several sources argue for deliberately preserving exemplary survivals: Simtokha dzong (which has largely kept its original pattern) and Gasa dzong (built in the 1650s, having retained its old fortress characteristics through relative neglect) are identified as cases where preserving fortress character would be valuable for Bhutan and the international community, and archaeological excavation around Gasa might recover the bastions, walls, and underground passages of the old strongholds ⁴². The urgency of conservation is increasingly recognized by officials, and Bhutan is described as among the rare places where a highly developed traditional architecture has survived intact and still functions in harmony with nature — making it an outrageous irony if these cultures were now submerged by inappropriate Westernized construction, just as advanced minds East and West turn toward integrating modern technology with respect for environment ²⁴.

8.3 Institutions, law, and policy for the built fabric

Bhutan’s heritage system combines a national administrative structure, a body of legislation and building regulation, the religious institutions that own and use much of the fabric, and international partners. The sources show this system developing from the 1980s onwards and note throughout its constraints in budget and trained personnel.

8.3.1 National institutions

The conservation of Bhutan’s built heritage was given a formal institutional structure in the 1980s. The Special Commission for Cultural Affairs (SCCA), created in 1985 and operational from May 1986 and chaired by the Minister of the Interior, was responsible for cultural affairs of the state, policy-making, and the administration, financing, and monitoring of cultural programmes; it operated as a small coordinating body constrained by budget and limited trained manpower ^5,11. Within it, the Division of Cultural Property (created in 1981) recorded all cultural properties through files and photographs, assessed building condition and advised on conservation, and maintained contact with keepers and owners through periodic instructions and workshops ⁵. The SCCA also comprised the national library, national museum, national school of painting and arts, royal dance troupe, and a division of ethics and protocol, with the Division for Cultural Properties having begun the difficult work of descriptive inventory ¹¹. The Division of Paintings and Arts (created 1971) trained students in traditional painting, sculpture, wood carving, and metalwork ⁵. Other responsible bodies named include the Ministry of Home Affairs (which maintained an architectural cell responsible for supervising major repairs, as at Punakha from 1987), the Ministry of Social Services (including the Department of Education and the Department of Works and Housing), the Dzongkha Development Commission, and the Central Monk Body / Dratshang Lhentsog (responsible for all monastic bodies) ^5,9.

In the later record, the central agency is the Department of Culture under the Ministry of Home and Cultural Affairs, responsible for conservation of historic sites and architectural heritage ¹³. The Department of Culture is described as the nodal agency for the preservation, protection, and promotion of cultural heritage, maintaining and updating the inventory of registration and designation and preparing management plans for each designated structure in consultation with local administration ¹². The Division for Conservation of Heritage Sites (DCHS) appears as the agency expected to use detailed site documentation as the basis for future conservation plans ^12,15. The National Museum, housed in the Ta Dzong at Paro and inaugurated in 1968, represents an institutional commitment to conservation and documentation of built heritage and material culture; considered a temple for the number of religious objects it holds, it requires visitors to proceed clockwise, preserving the sacred character of the space while enabling public access ³⁸.

The diversity of property regimes governing religious buildings, and the presence of multiple government ministries within dzong complexes, complicated a coherent national heritage policy, even though the SCCA held theoretical responsibility for architectural conservation through its technical service ¹¹.

8.3.2 Legislation, regulation, and the National Assembly

The principal early legal instrument was the “Antiques and Art Treasures Rules and Regulations” of 1988, which defined antiques as items in existence for not less than one hundred years — including any historical coin, sculpture, painting, appliqué, weaving, epigraph, or other work of art or craftsmanship of antique value; articles from a historical Naktsang, cave, dzong, monastery, temple, chorten, or ruin; and original manuscripts, records, or documents of scientific, historical, political, literary, or aesthetic value — and which mandated registration of all antiques, prohibited export without written permission, and established penalties ^5,14. The National Assembly adopted a series of resolutions on heritage: that all privately owned temples and chortens be properly maintained by their owners under district authority supervision; that an inventory of all cultural property in temples be undertaken by the government; and that the sale of antiquities between nationals be permitted but sale or gift to foreigners prohibited ⁵. The Division of Cultural Property compiled these decisions in a volume that, if edited and distributed, could help establish guidelines for officials ⁵. Recommendations for the future included adopting a “charter on cultural heritage” (as expressed in the Sixth and Seventh Five Year Development Plans), creating a “cultural council” to develop a law for the conservation of immovable and movable property with strategies to enforce it at all levels, and reinforcing the SCCA and especially the Division of Cultural Property in its responsibilities and technical skills ¹⁴.

Regulation of the living vernacular is unusually strict. The “Traditional Architecture Guidelines” of 1993 and the “Rural Construction Rules” of 2013 prescribe design details and building-material selection for new village buildings, leaving hardly any room for variation; no other country regulates the development of vernacular architecture as strictly as Bhutan ²³. These policies have produced a high level of visual coherence in village architecture even amid dramatic social and economic change, and the top-down approach has reduced the common Himalayan trend of private houses borrowing urban and monastic visual elements — but strict enforcement has also constrained adaptive responses to modernization and created tension between preservation and functional adaptation ²³. The 2003 regulation banning animals from the ground floors of any residential building was a significant intervention in traditional domestic organization, resulting in widespread conversion of former stables to storage or rental space and in external structures lacking the coherence of traditional buildings ²³.

8.3.3 International frameworks and donors

International institutions and conventions are repeatedly identified as relevant. As a UNESCO member since 1982, Bhutan was urged to ratify the international conventions of 1954, 1970, and 1972 in the field of cultural heritage; once a state party to the 1972 World Heritage Convention it could benefit from the World Heritage Fund for operations, training, or advice ¹⁴. The 1991/1992 survey work was conducted under a UNESCO Cultural Heritage Programme for Bhutan (UNDP/RAS/89/075), organizing conservation through international institutional frameworks ⁹. Conservation expertise has been drawn from neighbouring countries — the Archaeological Survey of India (ASI) restored mural paintings at Wangdi Phodrang dzong (1983–1985, and a wider 1983–1989 pilot project) — while restoration recommendations called for a “Bumthang development authority” of central government and local leaders aided by professional consultants ⁹.

Specific donor-funded projects illustrate the role of external partners. The Dechenphug conservation project (1996–1999) followed Bhutan’s 1990 request to UNESCO for help protecting its heritage; the Danish International Development Agency (Danida) financed it, UNESCO undertook it from 1994 under its scientific responsibility, and its aims were to renovate poorly maintained buildings, to demonstrate by concrete example what systematic heritage policy entailed, and to build the capacity of the SCCA and its personnel ¹¹. The conservation of Buli Monastery was undertaken by the Department of Culture in collaboration with Rumthang (Bumthang) District Administration and funded by the American Himalayan Foundation (AHF), an international NGO supporting Himalayan cultural and environmental preservation; carried out as the first Historic Monument Conservation Training Project (2002–2005) under the world-renowned conservation architect John Sanday (whose experience included Hanuman Dhoka Palace in Nepal, Buddhist monasteries in Mustang, and Angkor Wat), with AHF funding of eight million Bhutanese Ngultrum ¹³. (Further donor-funded technical collaborations — with the Courtauld Institute of Art — are treated under restoration and craft continuity in §§8.5–8.6.)

8.4 Documentation and the heritage inventory

Documentation is treated throughout the sources as the foundational conservation practice — the prerequisite for assessment, restoration, and management. The record extends from textual and historical sources, through measured architectural survey, to systematic inventories and digital databases.

8.4.1 Textual and historical documentation

The temples attributed to the early period of Buddhist diffusion are documented in multiple textual sources preserving variant accounts of founding, location, and significance. The Ma-ni bka'-'bum (versions A and B) gives the primary narrative of the mTha'-dul Yang-dul scheme and lists the twelve temples subjugating the demoness representing Tibet; later sources — Bu-ston’s history, the rGyal-po bka'-thang, bSod-nams rGyal-mtshan’s rGyal-rabs gsal-ba'i me-long, and Klong-rdol’s annotated version — give variant ascriptions and locations, with Klong-rdol’s notes especially valuable for temple locations ¹. The temple of dKon-mchog-gsum is identified in Kong-sprul’s gTer-mam as the former rTse-lung and is mentioned in the rGyal-po bka'-thang (f. 75b) and the Thang-yig gser-'phreng (f. 280b); its votive bell is documented through a fragmentary archaic-script inscription preserving dedicatory formulae and the name of its maker or overseer, identified as one of four great cong commissioned by the Tibetan royal family (with comparable examples at bSam-yas, Khra-'brug, and Yer-pa), and its stone plinth and megalithic elements through local tradition and gter-ma references ¹. The temples of A-nu in Gham-ling, Rin-chen dGe-gnas in Zung-nge, and Nam-mkha' in Chu-stod are documented in Padma Gling-pa’s version of the scheme and in the rGyal-po bka'-thang and Thang-yig gser-'phreng, while the 'Black' and 'White' temples of the Had valley appear in variant local traditions recorded by the author of LCB II (f. 64a-b) ¹.

The collecting of historical documents, written and oral, is treated as particularly important: inscriptions recording construction or restoration dates, lists of donors, and names of monks in charge; publications such as biographies of lamas, descriptions of pilgrimages and sacred places, and documents of local history; lists of former clergy in chronological order; and accounts kept by the secretary of the village assembly and village archives ¹⁴. Such data are valued not only for immediate preservation but for establishing a general inventory of religious culture in Bhutan ¹⁴. Oral histories and social and historical narratives complement the architectural record, recognizing that a structure’s full significance encompasses both material form and cultural context ¹².

8.4.2 Measured survey and architectural recording

At the scale of the individual monument, documentation encompasses obtaining, processing, presenting, and recording information to establish the existing condition of a structure in time and space ¹². The recording of Choedrak monastery produced measured drawings — ground-floor plan, attic floors, first floor, third floor, roof plan, and elevations — establishing a precise record of spatial organization, structural form, and material composition, together with photographic documentation of architectural detail and landscape setting ¹². This body of documentation is intended to serve multiple purposes: to record materials and techniques of ancestral times as a foundation for capacity building of artisans and for future site development; to ensure a basis for future research; to convey the traditional religious building typology; and to support future hands-on renovation works ¹².

The proposed strengthening of the Division of Cultural Property envisaged a Photographic Section, a Survey Section employing architecture, topography, and photogrammetry, and a Documentation Section housing a library and archives of old photographs, plans, drawings, and recorded interviews, with publication of an inventory of historical monuments in Dzongkha and English ⁵.

8.4.3 Inventory methods and counts

A systematic inventory of cultural heritage was undertaken, recording approximately two thousand historical and religious monuments: 16 dzongs, 525 temples owned by the State and held by the Monk Body, 144 temples owned by incarnate lamas, 800 temples owned by village communities, and 500 temples in private hands — figures excluding minor buildings such as gateways, water mills, and traditional bridges ⁵. Standardized tools were developed: model questionnaires for building inventory and model index cards for movable objects ⁵. The building questionnaire is organized by definition and type; localization and environment; cultural and historical elements; construction details; present state of conservation; structural condition; technological defects; and cost estimation, while movable-object index cards record material, dimensions, iconographical data, inscriptions, state of preservation, and place of deposit ¹⁴. A two-stage process is recommended: a preliminary inventory prepared by a local institution or person, heeding the advice of the people who use the building, followed by a formal SCCA inventory describing the building and presenting the issues, with a balance sought between the two ¹⁴. A reference volume of all monuments visited during the 1991 mission, giving their principal characteristics, was made available through UNESCO’s Division of the Physical Heritage ⁵.

At the district level a basic inventory exists: the 1991/1992 survey documented 30 major monuments across 10 districts with photographic records, condition assessments, and recommendations, and noted 92 temples in Bumthang according to district records; lists of outstanding monuments were prepared collaboratively with local authorities and religious leaders (Lam Jampe, Neten of Tongsa Rabde), but the survey concluded that comprehensive documentation was generally lacking and that detailed surveys of cultural treasures and historical monuments should precede change, organized under a committee with professional consultants ⁹.

8.4.4 The national digital inventory

A national heritage inventory emerged from discussions between international researchers and the DCHS regarding systematic documentation and management. Its objectives were to disseminate information and raise awareness among national and international audiences; to create a knowledge-based context for preservation, promotion, and management; to document condition, state of conservation, management planning, and changing circumstances; and to provide a foundation for potential World Heritage nominations ¹⁵. The framework reflects the three categories proposed in Bhutan’s draft Heritage Sites Bill — Heritage Buildings (religious buildings and vernacular architecture), Archaeological Sites, and Cultural Sites (landscape areas and agglomerations of historic and archaeological elements) ¹⁵. The ARCHES system was selected as the platform for its explicit semantic and ontological frameworks for organizing diverse information, allowing customization to Bhutanese needs ¹⁵. Implementation began in late 2015 with UNESCO support; the system was installed on a secure virtual server for DCHS testing and data entry, and a live system became operational by April 2016, with ongoing work to clean and transfer existing digital data ¹⁵. Developing standardized terminology (thesauri) proved complex: progress was made with conventional architectural terminology and with monument types reflecting specific Bhutanese forms — such as the component elements of lhakhangs — but establishing terminology for cultural periods remained difficult given the limited literature on pre-medieval and earlier periods ¹⁵. The system also served capacity building for DCHS staff in database management and GIS, and implementation highlighted the need to integrate the paper application forms for restoration and new construction (routinely submitted by monument managers and owners) into the broader management workflow, suggesting that standalone management-tracking systems might complement the inventory proper ¹⁵.

The detailed recording of an individual monument such as Choedrak is explicitly intended to feed this institutional system, serving as the basis for future conservation plans by the concerned agencies (particularly the DCHS) and accentuating the material and generic inventory and documentation of the monument’s artistic values ¹².

8.5 Restoration, repair, and post-disaster reconstruction

Restoration in Bhutan is documented both as an administrative process and as a body of technical practice spanning structures, timber, and wall paintings, and is repeatedly illustrated through case histories of post-disaster reconstruction.

8.5.1 Procedures and administration

When a monument needs repair, the owner — a private person, a monk body, or an incarnate lama — applies either to the district authority (Dzongda), who approaches the SCCA, or directly to the SCCA. The SCCA makes an enquiry and contacts the Ministry of Finances for funding and the Ministry of Home Affairs, which can authorize compulsory labour (gongdrak woola) of local villagers and skilled craftsmen; the SCCA appoints an engineer to prepare a budget estimate, work plan, and material specification ⁵. In October 1991 several monuments were scheduled for restoration, including Tango monastery and religious school (21,000,000 NU), Dechenphu monastery (5,000,000 NU), Dodedrag religious school (new buildings, 3,500,000 NU), and Donkorla, Tsandrag, and Yonla monasteries (no budget allocated) ⁵. The major renovation of Punakha dzong, begun in 1987, employed 60 carpenters, 30 carvers, and 500 labourers on site ⁵. Restoration recommendations stress that programmes be phased and use available skills, implying that intervention should be incremental and locally grounded ⁹.

8.5.2 Technical methods for structures, timber, and damp

The UNESCO documentation sets out detailed technical guidance. For structural movement, it advises first ascertaining whether movement is still active by bridging a crack with a thin glass “tell-tale” bedded in cement; breakage shows continued movement and its direction ¹⁴. For walls, openings are filled with well-matched stonework or with a reinforced-concrete bonder (maximum 100×25×25 cm) cast in situ; at roof level, a stone ring beam in cement mortar is used in non-serious cases, or a reinforced-concrete beam with thick-gauge mesh (avoiding steel bars) where walls are very unstable ¹⁴. For timber, wood should be dried before use, and inner structures should be well connected to supporting walls — if not, joined by bolting steel anchors to beam ends set in a concrete padstone ¹⁴. For rising damp, porous land drains are laid in a gravel-filled trench along external walls (kept clear of vegetation and rubbish to allow evaporation), and the ground around the wall base is carefully tabled to direct rainwater away ¹⁴. For roof coverings, shingles are chemically treated against fungus and woodworm, dipped in silicone to resist water, laid on battens and held by stones, then — if they curl after about a year — turned head to tail and nailed with non-ferrous nails ¹⁴. Dry rot must be investigated and treated as a matter of the greatest urgency: the structure is opened up where conditions favour an outbreak, every path of water travel and all timbers traced; affected timber is scrupulously removed and burned, and retained timber, walling, and finishes around the perimeter fully sterilized with fungicide ¹⁴. For environmental threats at Chörten Kora, a survey of water flow, a drainage system around the chörten, and protection of the Kulong-chu embankment by gabions (meshed wire and boulders) are recommended ¹⁴.

The Dechenphug renewal exemplifies condition-led structural repair. A British wood conservation specialist, David Michelmore, assessed posts, beams, joists, carpentry, and joinery; UNESCO acquired a penetrometer for the SCCA, able to detect decay invisible to the eye through controlled needle insertion, and systematic use confirmed the good general condition of structural timbers, so repairs were limited to partial renewal of joinery, flooring, and roofing — though for ritual reasons the monks refused to strip the tower sanctuaries of their draperies, weapons, and shields, so those timbers and murals could not be fully assessed or treated ¹¹.

8.5.3 Conservation of decorative timber: the Buli method

The Buli Monastery project followed a philosophy of minimum intervention with selective material replacement. Failed structural members were replaced with new seasoned timber of the same species and dimensions while original ornamental parts were retained intact; new members were treated with two coats of bitumen against future decay; and for the ornamental columns (Kachens), rotten bases were removed and replaced with seasoned timber of the same species and design, with small cross-ventilating openings made at their bases to prevent future moisture decay ¹³. The sequenced method first stabilized the tilting Rabsel (decorative windows) using temporary timber joists and hydraulic jacks to lift the sagging assembly and release load, then lowered it to the courtyard by pulleys fixed on the roof-truss tie beams; component-level inspection there distinguished decayed structural members from intact ornament; the units were repaired at a workshop established behind the monastery and refixed in their original positions, and the Kachens received the same extraction, inspection, base-replacement, and ventilation treatment — work completed by March 2005, as documented during the Buli Mani festival ¹³.

8.5.4 Conservation of wall paintings

Wall painting conservation requires that the structure first be made sound: roofing repaired against water infiltration, masonry joints refilled with similar original mortar and lime-washed against driving rain, and outer ground excavated to its original level with slopes, drainage, and where necessary a retaining wall to keep water from the wall base and reduce rising damp ¹⁰. Dangerously detached renderings are then given emergency consolidation by injecting liquid grouts of properties similar to the original plaster (cleaning and fixing surfaces if synthetic resins are used, to avoid staining); once the structure is stabilized, consolidation is revised to re-adhere the renderings; and flaking paint is fixed back with an inorganic fixative such as ethyl silicate, minimizing synthetic organic fixatives ¹⁰. Final presentation follows the principles described in §8.2.4 — toning down wear and losses with watercolour glazes, filling and integrating reconstructable lacunae with tratteggio, neutrally toning deeper lacunae, and integrating painted architectural elements for optical support — after which a maintenance course is given to the monks living in the lhakhang; the aim is to bring the original concept to light (even if fragmentary), increase historical value, and train participants for larger projects ¹⁰.

At Dechenphug, the canvas painting of Padmasambhava (late nineteenth or early twentieth century, brought from another monastery) was severely damaged and ill-fitted to the wall on which it had been repositioned; the restoration, executed by Rodolfo Luján-Lunsford with a team of ten students from the national school of painting, consolidated detached portions, filled lacunae, softened abrupt joints, and cleaned butter-lamp smoke to restore colour, while the underlying settlement crack — found to be stabilized — was investigated but not remedied; the team also conducted diagnostic missions elsewhere, particularly at Tamshing, which houses some of the country’s oldest murals ¹¹.

Newer technical investigation increasingly guides intervention. The Courtauld Institute’s research characterizes pigments, binding media, and plaster composition to set parameters for compatible repair materials; ground-penetrating radar assessment of paint-layer condition guides decisions, with delaminated areas consolidated using materials compatible with the original binding system; DNA analysis of proteinaceous binders permits selection of appropriate consolidants and adhesives; and systematic pigment sampling supports the matching of repair pigments for visual continuity ¹⁹. Degraded organic glazes pose a particular dilemma — at Chorten Lhakhang, Trongsa Dzong, a glaze of organic red with sparse azurite has lost translucency and now appears pale orange-pink rather than light purplish-red, and such altered coatings risk being removed as “dirt” rather than recognized as original design — while at Lama Lhakhang, Trongsa Dzong, severe paint flaking correlates with highly fluorescent original organic coatings whose presence creates an inherent structural weakness ¹⁷. A three-year research project (2008–2010) established that understanding the painted fabric’s stratigraphy, composition, and deterioration is essential to appropriate strategy, and the conservation programme at Tamzhing Monastery — undertaken jointly by the Ministry of Home and Cultural Affairs and the Courtauld Institute from September 2012, planned over four years (2012–2015) — marked a shift toward conservation based on investigation and analysis, with a multidisciplinary team (architects, engineers, conservators, timber specialists) addressing weakened rainwater-damaged timber and the buckling, cracking, and delamination of painted earthen plasters under uneven loading ^17,19.

Historic interventions reveal a long tradition of repair that prioritized sacred narrative and visual effect over material consistency — most clearly the eighteenth-century repainting at Tamzhing (see §8.2.4) ¹⁷. Innovative rescue techniques have also been deployed: when stone walls at Tango developed cracks that damaged the murals and necessitated demolition in 2020 (after seven years of investigation), conservators loosened, detached, and cut the mud-plaster walls panel by panel, saving some two hundred detached mud panels so the murals could survive reconstruction ^39,19. The Archaeological Survey of India carried out preservation of paintings in dzongs and monasteries (1983–1989) under a pilot project, advising on photographic documentation, filling of dents and cracks, cleaning, pigment consolidation, techniques to separate paintings from walls, and preservative chemicals ⁵.

8.5.5 Post-disaster reconstruction and major case histories

Punakha Dzong. The reconstruction of Punakha (1986–1999) exemplifies contemporary post-disaster renewal: a 1986 fire destroyed the south-west corner and the Je Khenpo’s winter quarters, and a 1994 flash flood seriously damaged the Dzongchung, accelerating works ⁴. The first major work, the Machen Lhakhang (completed 1991), was built by the best artisans recruited nationally after proving their expertise at the Ura village temple and the new Kurje temple in Bumthang, and introduced cement concrete and concrete-casting methods adapted to timber-architecture configurations — frescoes and sculptures traditionally built in timber now cast and sculpted in concrete in situ — with a notable flexibility allowing last-minute alterations after brief discussion between patron, master-builder, and ritual master ⁴. The second, the monks' “hundred-pillar” great assembly hall (Kunre), was demolished and rebuilt from scratch — its mural paintings and cosmic mandalas largely lost as historical evidence for lack of documentation — and showed how the Bhutanese went their own way even with foreign “conservationist” expertise involved ⁴. The third, the “little fortress” (Dzongchung), was rebuilt twice its original size after river-training works, incorporating features introduced at Thimphu and Punakha; the golden pinnacles (serto) were installed on the Dzongchung and Kunre in September–October 1996, and the consecration of the Machen Lhakhang and its Kudung chörten (housing Bhutan’s three most sacred relics) on 2 November 1996 marked a climax ⁴. Overall, Punakha’s repeated rebuilding has made it more impressive, shifting it from fortress toward a more residential appearance; its two fortified bridges were replaced and lost, and the forework lost its military role ^42,43.

Paro, Drukyel, and Taktsang. Paro Dzong burnt almost to the ground in October 1907, leaving only the walls, and was immediately rebuilt to the same design by Paro Penlop Dawa Penjor with money from a special national tax — a demonstration of commitment to architectural coherence and resource mobilization — with many ancillary fortifications surviving though somewhat ruinous, and the ta dzong recently restored to house the National Museum ^38,43. At Drukyel (Drukgyel) Dzong, a 1951 butter-lamp fire left only the walls; in 1985 a shingled roof was added to save the dzong from total ruin, restoring the appearance shown in its first published photograph (National Geographic, 1914) ³⁸. At Taktsang, the edifice was restored in 1861–5 under the 34th Je Khenpo Sheldrup Oezer and most recently in 1982 (with the chorten containing Langchen Pelkyi Singye’s remains restored 1982–3); Taktsang Ugyen Tsemo, first built in 1408, was rebuilt after a fire in 1958; and an 1985 restoration addressed roofs and timber structures ^38,9.

Wangdu Choling Dzong. Two major episodes are recorded. Jigme Namgyel renovated and extended the dzong during his retirement after 1866 ⁴⁷. Under the Second King Jigme Wangchuck, a comprehensive renovation (dated 1950–51) planned to demolish and reconstruct the entire complex: writs were dispatched to the garpas (master builders) of Mangde, Punakha, Hā, Kurtö, and Trongsa, and about three hundred responded, extracting timber from the mountains of Chokor (Upper Choekhor) over a whole summer and floating logs down the Chamkharchu, where the meadows became blanketed with timber ^47,48,49. The full reconstruction was never executed — the Second King died in January 1952 — and, decisively, Trongsa Neten Dranglapa Darga (Dranglapa Dargye) counselled the King to preserve the Utse in its original form because it represented the authentic workmanship of Chötse Pönlop Jigme Namgyel, establishing a conservation principle of preserving the master builder’s original work as a historical and architectural document while the rest was renewed; oral tradition records that the central tower’s rotten large windows (rabsel) were remade during this campaign ^47,48,49. The palace, damaged by the 1897 earthquake, later fell into disrepair after the Royal Family’s departure and the relocation of the capital westward, now wearing “a dreary look,” with hope of planned renovation involving international conservation experts ^49,47,48.

Tashichö and Tongsa. Tashichö dzong in Thimphu was extensively rebuilt in the 1960s with large new office wings for the modern central government, executed within a living tradition that still possessed traditional building knowledge and craftsmanship; the challenge lay in keeping the dzongs alive while preserving their historical character ^42,43. After the 1897 earthquake, the Tongsa Penlop rebuilt the two upper storeys of the five-storey building and decorated them at his own expense, and the Tongsa temples were later repainted at Sir Ugyen’s expense — evidence of continued state patronage of dzong maintenance ³.

Post-earthquake repair of 1897. Reconstruction after 1897 also revealed the limits of repair practice: at Tashi-cho-jong the rebuilt tower (completed c. 1902, with modern decoration) proved structurally defective, with cracking main walls and unequal interior subsidence, suggesting modern methods diverged from original constructional logic; at Poonakha, damaged frescoes were left in place or repaired while embroidered banners and brocade hangings were maintained; at Angdu-phodang repairs progressed slowly, and the restoration of one of its chapels by the Tongsa Donyer was very well executed ³.

Other recorded restorations. Kyichu Lhakhang was ordered restored in 1839 by the 25th Je Khenpo Sherab Gyeltsen, and rebuilt in 1832 following partial fire damage — its statues unharmed and subsequently burnished repeatedly with gold and repainted along with their frescoes, a practice of periodic renewal ^38,39. Dungtse Lhakhang was restored from 1841 under the same Je Khenpo, with all villages contributing, donors' names inscribed on the ground-floor tree-trunk columns, and the paintings redone ³⁸. In the UNESCO survey period, Taktsang was restored in 1985; Tango from 1985 (eastern monks' quarters rebuilt, full renovation expected by 1995); Punakha from 1987 under the Ministry of Home Affairs architectural cell; Wangdi Phodrang under repair since 1983 (1985 floors and pillars in the Shabdrung’s chamber; 1990 repaving of the main courtyard; 1991 kitchen and staircase; ASI mural restoration); and Chendebji chorten rebuilt in 1966 ⁹. Recommended works included complete restoration of Tamchog Lhakhang with new roof and mural preservation; urgent repair of Tongsa’s southern zimchung with courtyard drainage and roofing; detailed survey then major repairs at Tashigang; structural repairs and timber replacement at Rimochen; complete restoration of Tamshing (an October 1991 district-engineer estimate totalled 526,300.82 Nu for structural and timber work and 84,960.53 Nu for roofing); and major repair and renovation with documentation and mural restoration at Risum Gompa ^9,14.

Choedrak. Choedrak monastery has undergone several renovations since its twelfth-century foundation by disciples of Gyalwa Lorepa — renovated by Chhogyel Minjur Tenpa (1646–?) and the Fourth Je Khenpo Damchoe Pekar (1697–1707), with a new eastern temple built by the 7th Je Khenpo Ngawang Thinley — while neighbouring Tharpaling was restored most notably by the First King Sir Ugyen Wangchuck with Togden Shakya Shri (1853–1919) in the early twentieth century ¹². The condition of Choedrak now calls for minimum intervention, and the preservation of ruins is recommended to assist future intervention and ensure originality, with detailed recording intended to serve as the basis for future conservation plans by agencies such as the DCHS ¹².

8.5.6 The persistence of restoration as a living function

These case histories show restoration in Bhutan as part of an ongoing tradition rather than museum conservation: the dzongs remain functioning religious and administrative centres, rebuilding has often enlarged and enhanced them, and works are carried out within a society that still possesses traditional building knowledge — even as electric lights replace butter lamps, kitchens are modernized to reduce fire risk, and military architecture is generally neglected, with rare survivals such as the complete loopholed covered way to the chu tower at Jakaryugel (the only covered way left in Bhutan) and the surviving (if ruined) covered way and chu tower at Paro ^42,43.

8.6 Craft continuity and the sustainability of conservation practice

The long-term viability of conservation in Bhutan rests on whether the traditional building crafts, the institutions that train practitioners, and a sustained conservation philosophy can be maintained. The sources treat this as both a distinctive Bhutanese strength and a point of vulnerability.

8.6.1 The living master-builder tradition

A continuing tradition of building skills underpins ongoing conservation and restoration. The rebuilding of dzongs such as Punakha and Tashichö has been executed within a living tradition that still maintains knowledge of traditional techniques and craftsmanship — a continuity that distinguishes Bhutan from Tibet, where twentieth-century disruption severed many links to traditional practice ⁴². Yet because the pace and extent of change in the dzongs are now so significant, steps are urged to enhance awareness of restoration and conservation issues and techniques, taking care not to undermine the living tradition while preserving certain ancient examples (Simtokha, Gasa) for historical interest ⁴².

The sustainability of practice depends fundamentally on the master-builder tradition and the transmission of craft knowledge through apprenticeship and on-the-job training. The dzong functions as a permanent construction site and vocational training centre for village artisans: after completing reconstruction works, the professionally enriched and spiritually enlightened artisans disseminate new concepts at village and house level, and since a farmhouse’s woodwork is renewed roughly every twenty years (at least once a generation), new architectural trends pre-set by the dzongs are relatively quickly adopted even in remote places ⁴. The system of “scaling” — using the anthropometric scale of the master-builder rather than the patron — ritually links every craftsman from Bhutan’s most senior master-builder (zorig lapon or zorig chichop) up to the historical Balingpa and the mythical Vishwakarma, and down to the lowest apprentice, which explains the dignity accorded the village head-carpenter ⁴. The high standard of artisanal prefabricated timber architecture facilitates cultural transfer through demolition and renewal: the nailless timber system lets carpenters fabricate and test every component at ground level, enabling very high quality with only a few skilled experts and maximum use of unskilled labour ⁴.

8.6.2 Labour systems and their discontinuation

The unskilled labour for dzong reconstructions was, until recently, recruited under the gungda ula system (gung = family), a form of taxation requiring one person per family per year for two weeks in works of national importance; for dzongs this contribution (with pay) was called dzongsey ula, covering seasonal maintenance of dzongs and periodic maintenance of important temples ⁴. This labour-tax system was discontinued from 1996, raising the question whether considerations of national identity and cultural belonging were taken into account in the decision ⁴. Historically, compulsory labour (gongdrak woola) could also be authorized by the Ministry of Home Affairs for sanctioned repairs (see §8.5.1) ⁵.

8.6.3 Training, capacity building, and institutional models

A recurring concern is the severe lack of trained personnel at all levels capable of the technical conservation of Bhutan’s heritage, and the lack of a consistent conservation philosophy that perpetuates work inferior by modern standards — remediable, it is argued, through proper training and conservation technology ^5,14. The Division of Paintings and Arts (1971) trained 80 students in traditional painting, sculpture, wood carving, and metalwork under a chief artist and six master painters; a proposed working-unit-cum-school of traditional art and construction would need five or six master craftsmen (carpentry, stone masonry and foundation laying, painting), each with apprentices, and envisaged involving international master-craftsmen from European guilds or Buddhist countries where traditions remain alive ⁵. Special training is recommended for a small group of recently graduated Bhutanese architects and engineers who, conscious of the value of their heritage, could use their professional influence to bring conservation to the attention of authorities and the public; further training needs span administration, all engineering and architecture-related skills, and restoration of painting, supported by workshops, study tours, and on-site sessions to examine the strengths and weaknesses of restoration practice and to produce illustrated recommendations ^5,14. Interviews with craftsmen and foremen thoroughly acquainted with the materials are seen as a great asset to the documentary record, and conservation workshops are recommended to bring together Bhutanese administrators and technicians with selected foreign experts, and at district and village level the Dzongda, village headmen, district engineer, and reputed craftsmen (masons, carpenters, joiners, carvers, painters, contractors) ^5,14. Craftsmen have also been encouraged to produce and sell locally made products (textiles, wooden utensils, paintings), with master-craft training in Thimphu ¹⁴. The Central Monk Body is identified as a partner in conservation and cultural transmission — reinforcing the concept of conservation among the clergy (the heads of communities, neten, and local priests, gomchen), and organizing district-level workshops in association with health programmes — and a “Religion and Cultural Heritage” campaign is proposed on the model of the UNICEF–Monk Body “Religion and Health” programme ^5,14.

Several projects model how capacity is built in practice. At Dechenphug, the new service building was constructed entirely by local masons and carpenters using techniques still in daily use and fully mastered, with earth recovered from the demolished kitchen reused as mortar in new stone masonry laid with internal timber frames — so that repairs were comprehensible to local builders and maintainable by future generations using the same skills ¹¹. Field training of local actors was a major component: the SCCA secretary Sangay Wangchuk made multiple site visits, and technical discussions with SCCA colleagues Kinley Gyeltshen and Puchu Dukpa — who had received prior training (funded by the Ministry of Foreign Affairs) at the Pondicherry centre of the École française d'Extrême-Orient — made their knowledge more concrete; conferences during each mission explained objectives and criteria to concerned institutions and to the clergy, who as daily users could play a decisive role in preservation; and the acquisition of the penetrometer transferred appropriate diagnostic technology ^11,10. For wall painting, Rodolfo Luján-Lunsford trained a team of ten students from the national school of painting, addressing the urgent problem of degraded panels customarily being repainted entirely rather than conserved, and the trained team went on to diagnostic missions at other sites such as Tamshing ¹¹. A parallel UNESCO-sponsored programme trained students from the School of Arts and Crafts in Thimphu (Painting and Wood Carving sections) in theory, techniques, causes and effects of deterioration, and conservation methods across three missions; replacement trainees were brought up to speed and stimulated the group, and a didactic exhibition was prepared to introduce the lay public to this new field and encourage national and international awareness ¹⁰. A debate over institutional form arose: a suggestion that the team become a freelance enterprise dealing directly with monk and Dzongdag contractors was set against a recommendation that the group, training, and resources remain under government auspices as a governmental cooperative — with contractors paying the responsible government section, which would cover salaries, materials, and equipment, and earnings funding transport, living expenses outside Thimphu, and outside expertise for difficult cases — alongside the basic need to acquire conservation literature, then entirely lacking ¹⁰.

The Buli Monastery project was structured to ensure craft continuity and local capacity: a team of seven local carpenters from Gyatsa village (headed by Mr. Jobthong) worked alongside the consultant’s head carpenter, Mr. Nil Kumar Sheresta, an expert in historic timber conservation, so that local builders' knowledge met international expertise; established as the first Historic Monument Conservation Training Project, it gave trainees the chance to learn modern methods on real structural problems, involved local trainee architects to extend transfer to the next generation, and used the workshop behind the monastery as a local facility for craft work and training ¹³. The Courtauld–Department of Culture collaboration similarly built local capacity: the 2008–2010 research project incorporated training to exchange skills and diagnostic techniques (portable microscopy, ultraviolet imaging, cross-sectional analysis, SEM-EDX, and X-ray diffraction) with Department conservators, recognizing that preservation cannot be achieved through external expertise alone; and the four-year Tamzhing programme from 2012 extended this through a multidisciplinary team aiming to establish protocols transferable to other sites ¹⁷.

8.6.4 Risks to sustainability

Sustainability is nonetheless uncertain. The discontinuation of customary labour systems, the introduction of new materials and technologies, and modernization all pressure the master-builder tradition and apprenticeship system ⁴. The success of a single well-conducted project does not guarantee that future interventions will follow the same principles, and there is concern about a tendency toward over-elaboration and normalization according to idealized models — exemplified by the replacement of a simple sacred-rock shelter with an ornate canonical pavilion — which threatens the diversity and inventiveness of living Bhutanese architecture; sustainability therefore depends not only on craft continuity but on sustained commitment to conservation philosophy and the protection of architectural diversity ¹¹. The historical record shows both continuity and decline: high standards of carving, metalwork, and silverwork survived at the Ta-lo and Norbugang monasteries, and incense-making continued as a craft, yet the head lama at Ta-lo complained of difficulty completing a memorial, and the country’s impoverishment gave little encouragement to the old race of craftsmen, while the structural defects of the post-1897 Tashi-cho-jong reconstruction suggest building-craft knowledge may already have been compromised in modern repairs ³. In the wider Himalayan region, the rise of conservation by NGOs for whom wall painting is not a core mission — deploying unskilled paying volunteers and unsupervised local “trainees” who are then encouraged to teach others — has produced unacceptably low standards, making the maintenance of high standards and the development of genuine local expertise essential to preservation ¹⁷. The 1991/1992 survey likewise implied limited local craft capacity: it urged that restoration use “available skills,” noted that specialized expertise (such as ASI mural restoration) was drawn from outside Bhutan, recommended engaging professional consultants, and documented the substitution of modern materials for traditional roofing — all without analysing how traditional building crafts and the transmission of construction knowledge are sustained ⁹.

9 Conclusion

What emerges from this survey is the coherence of Bhutanese architecture as a single tradition. The same principles that govern a farmhouse govern a fortress: a battered, tapering mass of earth or stone carrying a nailless timber frame, surmounted by a deep shingled roof, with openings that lighten and enrich the wall as they ascend. This coherence is not the product of drawn codes but of an embodied discipline—proportion taken from the master-builder’s own measure and transmitted through apprenticeship—and of a cosmological order that makes siting, plan, and ornament expressions of a single religious vision. Form, material, and meaning are, in this tradition, inseparable.

That coherence is also historical. Bhutanese architecture began as an extension of Tibetan religious building, acquired its classical form in the dzong-building programme of the Zhabdrung in the seventeenth century, and was carried with remarkable fidelity into the twentieth, when modern reconstruction could still be made indistinguishable from older work. The tradition’s strength has lain precisely in this continuity: in a living master-builder lineage, in the practice of exact rebuilding after fire or earthquake, and in monuments that have never ceased to be used.

The same continuity, however, frames the tradition’s present predicament. The features that make Bhutanese architecture distinctive—its reliance on earth, timber, and joinery; its dependence on communal labour and an unbroken transmission of craft; its acceptance of renewal and impermanence—are the very features most exposed to modernization. Concrete painted in “Bhutanese style,” the substitution of galvanised sheet for shingle, the discontinuation of customary labour systems, and the loss of the dzong’s defensive function each register a weakening of the coherence between form, material, and environmental logic on which the tradition rested. The conservation of this heritage therefore poses a question that external preservation doctrine cannot answer on its own: how to keep a living architecture alive without freezing it, and how to sustain the craft and the conservation philosophy together.

The premise of this essay has been that such questions are best approached through the buildings themselves. Read as primary documents—corroborated by chronicle, drawing, photograph, and laboratory—the standing dzongs, temples, chortens, and farmhouses of Bhutan record not only a distinctive architectural language but the society that built and continues to inhabit it. Their study is, in the end, inseparable from their care.