In 1893, architect Victor Horta put the finishing touches to Tassel House, the founding work of the Art Nouveau movement in Brussels. The impressive modernity of its facade and its sumptuous interiors - all in stained glass, mosaics and wrought iron - marked the history of architecture. It ushered in a veritable aesthetic revolution characterised by curved lines, plant motifs, a mastery of light and the use of modern materials such as iron and steel. Art Nouveau was born and spread throughout Europe.