Daniel-Henry Kahnweiler

Daniel-Henry Kahnweiler (25 June 1884 – 11 January 1979) was a German-born art collector, and one of the most notable French art dealers of the 20th century. He became prominent as an art gallery owner in Paris beginning in 1907 and was among the first champions of Pablo Picasso, Georges Braque and the Cubist movement in art. Provided by Wikipedia