License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Polidoro da Caravaggio. Studies for an Altarpiece with the Virgin Enthroned, Attended by Four Saints (recto); Various Figure Studies, Some Possibly for a Deposition of Christ (verso), 1530–35. The Metropolitan Museum of Art.