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
20th-century Western painting for that spiritual knowledge. Other major pioneers of early abstraction include Swedish painter Hilma af Klint, Russian painter Kazimir Malevich, and Swiss painter Paul Klee. Robert Delaunay was a French artist who is associated with Orphism, (reminiscent of a link between pure abstraction and cubism). His later works were more abstract, reminiscent of Paul Klee. His key contributions to abstract painting refer to his bold use of color, and a clear love of experimentation of both depth and tone. At the invitation of Kandinsky, Delaunay and his wife the artist Sonia Delaunay, joined The Blue Rider (Der Blaue Reiter), a