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 horseman with sword in hand galloping towards the right, other horsemen galloping towards the left in the background, from "Various cavalry exercises" (Diverses exercices de cavalerie), ca. 1645–46. The Metropolitan Museum of Art.