20th-century Western painting modern painting. It reflected Matisse's incipient fascination with primitive art: the intense warm color of the figures against the cool blue-green background and the rhythmical succession of the dancing nudes convey the feelings of emotional liberation and hedonism. Initially influenced by Toulouse-Lautrec, Gauguin, and other late-19th-century innovators, Pablo Picasso made his first cubist paintings 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; see gallery) Picasso created a new and radical picture depicting a raw and primitive brothel scene with five prostitutes, violently
Pablo Picasso her home in Paris. At one of her gatherings in 1905, he met Henri Matisse, who was to become a lifelong friend and rival. The Steins introduced him to Claribel Cone and her sister Etta who were American art collectors; they also began to acquire Picasso and Matisse's paintings. Eventually Leo Stein moved to Italy. Michael and Sarah Stein became patrons of Matisse, while Gertrude Stein continued to collect Picasso. In 1907, Picasso joined an art gallery that had recently been opened in Paris by Daniel-Henry Kahnweiler. Kahnweiler was a German art historian and art collector who became one of