License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Stefano della Bella. Two horsemen descend a hill in center, following another man on foot, a castle in the mountains in the center background, from "Various Landscapes" (Divers Paysages), ca. 1641. The Metropolitan Museum of Art.