Keywords: Leonardo da vinci, Studies of human skull.jpg Artwork Creator Leonardo Da Vinci 1489 Pen ink and black chalk on paper size mm 188 134 Institution Royal Library Windsor object history credit line accession number WGA link 12822 http //www wga hu/art/l/leonardo/10anatom/2head3 jpg http //www wga hu/html/l/leonardo/10anatom/2head3 html PD-old-100 graphics study Italian 1451-1500 WGA form graphics WGA type study WGA School Italian WGA time period 1451-1500 Anatomical studies by Leonardo da Vinci Codex Windsor Anatomy of the human head Cranial cavity |