License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Giorgio di Giovanni ("Giorgio da Siena"). Studies of a Gentian, Moth, Birds, Cats, Interlacing Motif, and Greek Frets (recto); Ornamental Studies with Figures (verso), 1530–40. The Metropolitan Museum of Art.