License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Mathäus Küsel. Courtyard of a palace with a man standing at center surrounded by attendants; above, a vision of a woman in a similar scene; set design from 'Il Pomo D'Oro', 1668. The Metropolitan Museum of Art.