20th-century French art by Neo-Impressionism and Divisionism, experiments in colour and content that Impressionism, Post-Impressionism and Symbolism had unleashed. The products of the far east also brought new influences. Les Nabis explored a decorative art in flat plains with a Japanese print graphic approach. From 1904 Les Fauves exploded in color (much like German Expressionism). The influence of African tribal masks led Pablo Picasso to his "Demoiselles d'Avignon" of 1907. Picasso and Georges Braque (working independently) returned to and refined Cézanne's way of rationally understanding objects in a flat medium; but their experiments in cubism would also lead them to integrate all aspects
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