Remember that a painting - before it is a battle horse, a nude model, or some anecdote - is essentially a flat surface covered with colours assembled in a certain order.

Following her death in 1919 Denis painted a chapel dedicated to her memory. "


Personal life
Denis a Catholic tertiary married his first wife Marthe Meurier in 1893. "
In 1898 he produced a theory of creation that found the source for art in the character of the painter: "That which creates a work of art is the power and the will of the artist.

His theories contributed to the foundations of cubism fauvism and abstract art.