Art Nouveau was an ornamental style of art popular between 1890-1914 that emphasized natural forms like flowers and vines. It originated in England and spread throughout Europe, going by different names in different countries. Key figures who promoted the style included Siegfried Bing and architects Victor Horta, Hector Guimard, Charles Rennie Mackintosh, Antoni Gaudi, and Louis Sullivan. Art Nouveau embraced many art forms and was characterized by flowing, asymmetrical lines inspired by nature. Though short-lived, it was an influential precursor to modern design.