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 128: Galatea and Acis Embracing, while Polyphemus Sings for Galatea (Acidis, Galateaeq, furtivi concubitus), from Ovid's 'Metamorphoses', 1606. The Metropolitan Museum of Art.