License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Marco Dente. Galatea escaping Polyphemus; he is seated on a rock holding a staff and pipes and looking towards Galatea at right riding a shell pulled by two dolphins, Cupid flying above, ca. 1515–27. The Metropolitan Museum of Art.