License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Amico Aspertini. Studies after the Antique: The Fall of Phaëthon, Horses, Reclining Women with Children (recto); Studies after the Antique: An Altar or Urn, Lion Attacking a Horse (verso), 1474–1552. The Metropolitan Museum of Art.