Maurice Denis was a French painter, decorative artist, and writer. An important figure in the changing world of late 19th-century European art, Denis is associated with Les Nabis, Symbolism, and later Neo-classicism. His theories contributed to the foundations of Cubism, Fauvism, and abstraction. After World War I, Denis founded the Ateliers d'Art Sacré, decorated the interiors of churches, and worked for a revival of religious art.