(1861-1947) Belgian Art Nouveau architect. He was responsible for a series of apartment buildings in Brussels, the first of which, Hôtel Tassel 1892, is striking in its use of sinuous forms and decorative ironwork in the interior, particularly the staircase. His sumptuous Hôtel Solvay 1895–1900 and Maison du Peuple 1896–99 are more complete, interior and exterior being unified in a stylistic whole.