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. A horse in profile facing the left, about to descend from a mound, a horseman to left in background, plate 4 from "Diversi capricci", ca. 1644–47. The Metropolitan Museum of Art.