License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Jacques Callot. L'Oiseau Posé sur un Chardon en Fleurs (The Bird Standing on Thistle Flower), plate 13 from "Lux Claustri ou La Lumière du Cloitre" (The Light of the Cloisters), 1625–31. The Metropolitan Museum of Art.