License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Mathäus Küsel. Kingdom of Pluto; a view of the underworld with Pluto and Proserpina enthroned at center, surrounded by demons; set design from 'Il Pomo D'Oro', 1668. The Metropolitan Museum of Art.