Victor Horta was a Belgian architect who pioneered the Art Nouveau style in the late 19th century. He is known for his whiplash design style using organic forms and sensuous curves. Two of his most famous buildings were the Hotel Tassel in Brussels, built in 1893-1894, which featured a curved bay and symmetrical facade, and the Hôtel Van Eetvelde in Brussels from 1895-1898, which had an iron frame structure and whiplash curves in the design. Horta was a revolutionary architect who helped establish the Belgian Art Nouveau style through his unique designs.