Victor Horta was a Belgian architect who pioneered the Art Nouveau style in the late 19th century. He designed several iconic buildings in Brussels using organic forms and nature-inspired motifs. Some of his most famous works include the Hotel Tassel, considered the first true Art Nouveau building, and the Hôtel Van Eetvelde, which featured his signature whiplash curves. After World War I, Horta's style evolved away from Art Nouveau toward a more geometric approach as seen in his later works like the Palais des Beaux-Arts in Brussels. He had a significant influence on European architecture in the early modern era.