License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Johann Heinrich Tischbein the Elder. Carlo and Ubaldo Resisting the Enchantments of Armida's Nymphs (from Torquato Tasso's "Gerusalemme liberata", 15:57-58), 1782. The Metropolitan Museum of Art.