The Hôtel Tassel was constructed in 1893, with work beginning in 1892 and completion following in 1893.
Victor Horta designed the Brussels townhouse for Émile Tassel, a scientist and professor at the Université libre de Bruxelles. The building is often identified as one of the first fully developed Art Nouveau houses because Horta rejected the conventional layout of narrow rooms arranged along a corridor.
Instead, the house is organized around a central circulation space and a light-filled stair hall. Horta combined brick, stone, iron, glass, mosaic, stained glass, and organic ornament so that the architecture and interior decoration formed a single design. The exposed structure and flowing lines became influential features of Brussels Art Nouveau.
The date can cause confusion because references may describe the project as spanning 1892–1893 or label it “1893–94” in captions and scholarly discussions. For a year-based quiz asking when it was constructed, 1893 is the conventional completion date and the intended answer. The Hôtel Tassel later became part of the UNESCO World Heritage listing for Victor Horta’s major town houses in Brussels.