George Braque was a French painter and sculptor, one of the inventors of Cubism along with Pablo Picasso. Braque and Pablo Picasso worked together in developing Cubism, from 1909. In the process of mutual artistic stimulation they created paintings of great consistency in their mutual resemblance, color scheme and architectonic solidity of composition. By 1911 Braque and Picasso became extremely similar in style. In 1912 both started to incorporate collage in their compositions. Their artistic collaboration lasted until the beginning of WWI in 1914. Both artists enjoyed financial and spiritual support from Gertrude Stein.