The story of the Carnegie Library of Reims is not one of creation, but of resurrection. Its foundations are laid not merely in soil, but upon an event that was both an end and a beginning: On May 3, 1917, an incendiary shell found its mark, consuming the original municipal library housed within the city hall. Yet, in a deliberate act of foresight, nearly 100,000 of the most valuable documents had already been evacuated, a ghost of a collection preserved in exile. The building that stands today is a phoenix of Art Deco, a testament to the belief that knowledge can be a more durable force for peace than the weapons that sought to destroy it. This act of preservation amidst the chaos of World War I was the first, quiet victory that made its successor possible.

In the aftermath of the war, the city lay in ruins, incapable of rebuilding its treasury of books. The catalyst for its rebirth was the Carnegie Endowment for International Peace, which allocated $200,000 to Reims for this specific purpose, placing it alongside Leuven and Belgrade as a front-line city receiving a grant for rebirth.

The library, a conscious emblem of global reconciliation, was designed by French architect Max Sainsaulieu. Funded by the endowment established by the Scottish-American philanthropist Andrew Carnegie, the grant transformed a shared ideal into stone and glass. Construction began in 1921, culminating in a structure that was officially inaugurated on June 10, 1928, in a ceremony graced by French President Gaston Doumergue and U.S. Ambassador Myron T. Herrick. Sainsaulieu, initially envisioning a classical design, was swayed by the modern spirit of the age, ultimately opting for the bold, geometric lines of the Art Deco style. Its façade, decorated with mosaics by Biret and a bas-relief by sculptor Edouard Sediey, symbolizes the flowering of the mind. The wrought iron entrance gate, a masterpiece by Schwartz-Haumont that had won a gold medal at the 1925 International Exposition in Paris.

Its design is a rich tapestry of high-quality materials and symbolic intent. The library's motto, "Educunt folia fructum" (From flowers come fruit), is engraved over the entrance, a promise of the intellectual fruit the library would bear. Inside, the lobby is a 10 by 10-meter space topped by a cupola with an Art Deco lantern pendant designed by master glassmaker Jacques Simon. The walls feature Algerian onyx panels framed by green marble. The main Reading Room, with its oak floor and mahogany paneling, is illuminated by a large glass ceiling (verrière) by Jacques Gruber. The library's most distinctive feature is its semi-circular shape book stacks across five levels, a design that can accommodate nearly 400,000 books, which required delicate negotiation with city planners.

The library now safeguards approximately 400,000 documents. Its holdings include 3,000 manuscripts, with 800 from the medieval period—51 of which hail from the precious Carolingian era. A renovation project in 2001 carefully updated the building, installing air conditioning in the stacks to protect the fragile paper. For the first time, the semi-circular design allowed for the efficient storage and protection of its treasures, a fitting home for a collection that has already survived its own apocalypse.