Caption:
Roman Emperor Nero 37-68, and his mother Agrippina the Younger, 15-59. Engraved gem in jacinth. Nero et Agrippina in Hyacintho. Copperplate engraving from Francesco Valesio, Antonio Gori and Ridolfino Venutis Academia Etrusca, Museum Cortonense in quo Vetera Monumenta, (Etruscan Academy or Museum of Cortona), Faustus Amideus, Rome, 1750.