20th-century Western painting painted women, reminiscent of African tribal masks and his own new proto-Cubist inventions. Analytic cubism, exemplified by "Violin and Candlestick, Paris", was jointly developed by Pablo Picasso and Georges Braque from about 1908 through 1912. Analytic cubism was followed by Synthetic cubism, characterized by the introduction of different textures, surfaces, collage elements, papier collé and a large variety of merged subject matter. Crystal Cubism was a distilled form of Cubism consistent with a shift between 1915 and 1916 towards a strong emphasis on flat surface activity and large overlapping geometric planes, practised by Braque, Picasso, Jean Metzinger, Albert Gleizes, Juan
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