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. Two Tritons wrestling with other Sea Creatures, plate 13 from "Decorative friezes and foliage" (Ornamenti di fregi e fogliami), ca. 1645–50. The Metropolitan Museum of Art.