Art Nouveau (French: 'new art'), known as Jugendstil in Germany and Sezessionsstil in Austria, was a decorative arts movement that flourished from approximately 1890 to 1910, using organic, flowing forms derived from natural structures — plants, flowers, insects, the female form — as the basis for an entirely new visual vocabulary that would break with historical revivalism. Victor Horta's Hôtel Tassel in Brussels (1893) was its first architectural masterpiece: iron columns resolved into branching stems, floors tiled with swirling organic patterns, every surface integrated into a total design. In graphic art, Alphonse Mucha's lithographic posters are its most recognised expression. In architecture, Antoni Gaudí carried it to its most radical extreme in Barcelona, designing the Sagrada Família and the Casa Batlló as organisms rather than buildings. Art Nouveau was eventually displaced by the First World War and the functionalism that followed it.