A Few of Raphael’s Preparatory Drawings for his Philosophy wall in Vatican
(aka, The School of Athens)

Raphael, Cartoon for School of Athens, charcoal, graphite, black ink, white heightening on paper, 312 × 108 inches. Biblioteca Ambrosiana, Milan. Courtesy Creative Commons. Photographer: Christelle Molinié

 To see more Raphael drawings, I recommend Raphael: the Drawings from the Ashmolean Museum (FYI, this site is an Amazon Associate, so if you buy the book through the link above this site receives a small commission at no extra cost to you!)