For 10 points, identify this Spanish-born artist, best known for Guernica.
This artist's Charnel House concluded a series that began with his most famous piece, which also included The Weeping Woman. He created two paintings by the name of Three Musicians in 1921, and both are believed to feature his friend Guillaume Apollinaire. He painted Boy with a Pipe during his Rose Period that came after his Blue Period, and, with Les Demoiselles d'Avignon, developed the basic concepts of cubism. For 10 points, identify this Spanish-born artist, best known for Guernica.
This artist's Charnel House concluded a series that began with his most famous piece, which also included The Weeping Woman.
Pablo Ruiz y Picasso