Keywords: Studies of embryos.jpg Artwork Creator Leonardo Da Vinci between 1509 1514 Black and red chalk pen and ink wash on paper size mm 305 220 Institution Royal Library Windsor object history credit line accession number WGA link 12833 http //www wga hu/art/l/leonardo/10anatom/9embryo jpg http //www wga hu/html/l/leonardo/10anatom/9embryo html PD-old-100 graphics study Italian 1451-1500 WGA form graphics WGA type study WGA School Italian WGA time period 1451-1500 Studies of Embryos by Leonardo da Vinci |