License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Anonymous, Italian, Roman-Bolognese, 17th century. Fantasy based on Vatican: Sistine Chapel, Loggia (identification by James S. Ackerman) (recto); A Lion (verso), 17th century. The Metropolitan Museum of Art.