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. Cornice and column from the Temple of Fortuna Virilis (Tempio della Fortuna Virile), from "Le Antichità Romane", 1756. The Metropolitan Museum of Art.