Art Nouveau glass art is a type of finely-made, undulating, sinuous and colorful art objects, usually inspired by natural forms, in the Art Nouveau style, It most prominently appeared in the 1890s in the work of the American Louis Comfort Tiffany, Rene Lalique, Emile Gallé and the Daum brothers in France, Christopher Dresser in Scotland, and Friedrich Zitzman, Karl Koepping and Max Ritter von Spaun in Germany.