Georges Braque

Georges Braque, 1908, photograph published in Gelett Burgess, The Wild Men of Paris, Architectural Record, May 1910
A cofounder of Cubism
Georges Braque (1882-1963) helped developed Cubism along with Picasso, and remained the most faithful to exploring the concept’s limits, eventually starting to collage into his works bits of paper and cardboard.
He also had a thing for guitars.