Engraving showing a partial view of the Palace of the Caesars on the Palatine hill, built by Emperor Caligula, after a design by the French painter and engraver Jean Barbault (1718 - 1766) from Les Plus Beaux Monuments de Rome Ancienne ou Recueil des plus beaux Morceaux de l'Antiquité Romaine qui existent encore (ca. 1761), plate 33 page 54 and engraved by the Italian printmaker Domenico Montagù (active ca. 1750–76)