sentences:  He purchased his first Picasso in 1905, and was one of the first collectors of the Cubist paintings of Pablo Picasso and Georges Braque.He met Robert Delaunay, Sonia Terk and Henri Rousseau in 1907, and opened his art gallery in 1908, rue Notre-Dame-des-Champs (Paris) where he exhibited Georges Braque, Jean Metzinger, Sonia Delaunay, André Derain, Raoul Dufy, Auguste Herbin, Jules Pascin and Pablo Picasso.Uhde commissioned Picasso to paint his portrait (1910) and produced the first monograph on Rousseau in 1911.