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. Plate 6: a skirmish between two horsemen to left, a dead man on the ground to the right, combat in the background, from "Troops, cannons, and attacks on towns" (Dessins de quelques conduites de troupes, canons, et ataques de villes), ca. 1640. The Metropolitan Museum of Art.