License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Anonymous, French, 16th century. Arco dei Pantani, Forum of Augustus, cornice, elevation; schematic elevation (recto) Temple of Apollo Sosiano, column base, elevation (verso), early to mid-16th century. The Metropolitan Museum of Art.