License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Mathäus Küsel. The leaders of two armies conversing, their respective troops and camps on either side; above, Minerva observes from her chariot; set design from 'Il Pomo D'Oro', 1668. The Metropolitan Museum of Art.