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 rider making his horse drink from a basin of a fountain at left, another horseman seen from behind riding towards the left in the background, plate 19 from "Various figures and doodles" (Diverses figures et griffonnemens), ca. 1646. The Metropolitan Museum of Art.