Picasso and Braque started the style when they followed the advice of Paul Cézanne, who in 1904 said artists should treat nature "in terms of the cylinder, the sphere and the cone." They were also inspired by African sculpture. There were 3 phases of Cubism, Facet Cubism, Analytical Cubism and Synthetic cubism.

Facet Cubism was a forerunner to analytical cubism and the first phase, the paintings, painted in the style contained no illusion of depth and used simple geometric shapes.

Pablo Picasso, Les Demoiselles d'Avignon (1907)

The painting Les Demoiselles d'Avignon by Pablo Picasso is an example of facet cubism; it’s a broth

found at http://facstaff.uww.edu/allsenjm/WOTA/IMAGES/Demoiselles.htm

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