Georges Braque was a French painter who worked closely with Pablo Picasso in developing Cubism between 1907-1914. The document highlights key works by Braque such as "The Harbor" from 1906 and Cubist works created with Picasso including "Violin and Pitcher" and "Clarinet and a Bottle of Rum on a Mantelpiece" from 1911 that helped establish Cubism as a revolutionary new art movement.