20th-century Western painting painters included Albert Marquet, Charles Camoin, Maurice de Vlaminck, Raoul Dufy, Othon Friesz, the Dutch painter Kees van Dongen, and Picasso's partner in Cubism, Georges Braque amongst others. Fauvism, as a movement, had no concrete theories, and was short lived, beginning in 1905 and ending in 1907. The Fauves had only three exhibitions. Matisse was seen as the leader of the movement, due to his seniority in age and prior self-establishment in the academic art world. His 1905 portrait of Mme. Matisse, "The Green Line" (above), caused a sensation in Paris when it was first exhibited. He said he wanted
Crystal Cubism towards the end of 1916, with an art world still under the pressures of war, to show the parallels between the poetic theories of Guillaume Apollinaire of Max Jacob and himself in marking the burgeoning of a new era for poetry and artistic reflection. In "Nord-Sud" Reverdy, with the help of Dermée and Georges Braque, exposed his literary theories, and outlined a coherent theoretical stance on the latest developments in Cubism. His treatise "On Cubism", published in the first issue of "Nord-Sud", did so perhaps most influentially. With his characteristic preference for offense rather than defense, Reverdy launched an attack