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. Seven columns of the Temple of Juturna with Corinthian capitals . . . (Sette colonne con capitelli corinti spettanti al Tempio di Giuturna . . .), 18th century. The Metropolitan Museum of Art.