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. The Palais d'Orléans, from "Various views of remarkable places in Italy and France" (Diverses vues d'endroits remarquables d'Italie et de France), 1649–51. The Metropolitan Museum of Art.