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 atop a rearing horse, in profile and turned towards the right, gardens in the background, from "Various cavalry exercises" (Diverses exercices de cavalerie), ca. 1642–45. The Metropolitan Museum of Art.