Saint John on Patmos, circa 1547

Date: circa 1547. Dimensions: Overall: 19.6 x 15.3 cm (7 11/16 x 6 in.); ; support: 33.2 x 28.7 cm (13 1/16 x 11 5/16 in.). Medium: black chalk, brown wash, gouache, laid paper, pen and black ink. Collection: National Gallery of Art.