License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Giovanni Battista Piranesi. Large marble vase decorated with a relief of the sacrifice of Iphigenia, from "Vasi, candelabri, cippi, sarcofagi, tripodi, lucerne, ed ornamenti antichi disegnati ed incisi dal Cav. Gio. Batt. Piranesi, Vol. II" (Vases, candelabra, grave stones, sarcophagi, tripods, lamps, and ornaments designed and etched by Cavalieri Giovanni Battista Piranesi), 1778–80. The Metropolitan Museum of Art.