Abstract art based on Cézanne's idea that all depiction of nature can be reduced to three solids: cube, sphere and cone. With the painting "Les Demoiselles d'Avignon" (1907), Picasso dramatically created a new and radical picture depicting a raw and primitive brothel scene with five prostitutes, violently painted women, reminiscent of African tribal masks and his own new Cubist inventions. Analytic cubism was jointly developed by Pablo Picasso and Georges Braque, from about 1908 through 1912. Analytic cubism, the first clear manifestation of cubism, was followed by Synthetic cubism, practiced by Braque, Picasso, Fernand Léger, Juan Gris, Albert Gleizes, Marcel Duchamp and
Guernica (Picasso) of preliminary studies, the so-called primary project, that show an atelier installation incorporating the central triangular shape which reappears in the final version of "Guernica", Becht-Jördens and Wehmeier interpret the painting as a self-referential composition in the tradition of atelier paintings such as "Las Meninas" by Diego Velázquez. In his "chef d'oeuvre", Picasso seems to be trying to define his role and his power as an artist in the face of political power and violence. But far from being a mere political painting, "Guernica" should be seen as Picasso's comment on what art can actually contribute towards the self-assertion that