License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Jacques Callot. Le Chat Guettant L'Oiseau en Cage (The Cat Watching the Bird in the Cage), plate 10 from "Lux Claustri ou La Lumière du Cloitre" (The Light of the Cloisters), 1621–35. The Metropolitan Museum of Art.