License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Alexandre Denis Abel de Pujol. Allegorical Figure of the City of Piacenza, for a Pendentive in the Chapel of Saint-Roch, Church of Saint-Sulpice, Paris (recto); Studies for the Same Figure (verso), 1821. The Metropolitan Museum of Art.