License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Antonio Tempesta. Plate 136: Circe Changing Picus into a Bird (Circes concubitum detestatur Picus), from Ovid's 'Metamorphoses', 1606. The Metropolitan Museum of Art.