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 110: Morpheus, as Ceyx, Appearing to Alcyone (Morpheus Ceycis corpus Halcyoni representat), from Ovid's 'Metamorphoses', 1606. The Metropolitan Museum of Art.