Prussian King Frederick the Great designed his summer palace with a grammatical riddle cast in gilded bronze on its dome: "SANS, SOUCI." followed by a curious comma and a full stop.

In 1745, Frederick handed his personal sketches to architect Georg Wenzeslaus von Knobelsdorff. The king demanded a single-story villa resting directly on the bare earth, wanting to step straight from his rooms onto the warm soil of his vineyard. Knobelsdorff warned that omitting a raised basement would invite dampness and ruin the floors. Frederick refused to yield, dismissed his architect, and hired Jan Bouman to finish the project. The dampness eventually came, bringing arthritis to the king's final years, yet his stubborn vision prevailed.

The building stretches 91.6 meters across the crest of six south-facing wine terraces, where grapes and figs ripen inside glazed niches. On the north side, eighty-eight Corinthian columns curve outward to form a quiet courtyard. Inside, the single-story layout contains ten principal rooms. The oval Marble Hall mimics the Roman Pantheon, its dome lit by a central oculus that casts cool light over Carrara marble columns. To the east, the Concert Room features gilded Rococo stucco and paintings by Antoine Pesne. Here, the king played his flute, the music bouncing off the gold-leafed walls. Nearby, a hidden door leads to a circular library paneled in fragrant cedarwood, holding twenty-one hundred French volumes.

Frederick ruled his kingdom with military discipline, yet he sought peace in this small sanctuary. He died here in his armchair on August 17, 1786. He wished to be buried on the highest terrace next to his beloved greyhounds. This final request was delayed for over two centuries. In August 1991, his remains were finally reinterred in the vineyard crypt. Today, visitors leave potatoes on his simple gravestone, honoring the monarch who introduced the crop to Prussia. The palace remains intact, a physical record of a king's private mind.