Maurice Denis (French: [dəni]; 25 November 1870 – 13 November 1943) 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 (Workshops of Sacred Art), decorated the interiors of churches, and worked for a revival of religious art.
General info from Wikipedia.org