Portrait of the artist’s great-granduncle Yizhai at the age of eighty-fiveRuan Zude, dated 1561 or 1621
Sheet with Two Studies: a Tree, and the Upper Part of a Head of the Artist Wearing a Velvet CapRembrandt van Rijn, c. 1642
Compositional Sketches for the Virgin Adoring the Christ Child, with and without the Infant St. John the Baptist; Diagram of a Perspectival Projection (recto); Slight Doodles (verso)Leonardo da Vinci, 1480–85
