Cubism was an influential early 20th century art movement begun by Pablo Picasso and Georges Braque in 1907. They were inspired by African sculpture and painters like Cézanne and Seurat. Cubist works break up and analyze subjects and reassemble them in abstracted forms following Cézanne's advice to treat nature in terms of cylinders, spheres, and cones. Key Cubist artists mentioned include Raymond Duchamp-Villon, Albert Gleizes, Fernand Léger, Pablo Picasso, and Georges Braque.