Keywords: Intaglio Nero CdM.jpg Emperor Nero as Apollo playing the lyre Roman intaglio Néron en Apollon jouant de la lyre intaille romaine century 1 AD amethyst engraved Institution Cabinet des Médailles object history Treasure of St Denis credit line accession number own photo date 2006 Marie-Lan Nguyen artwork license PD-old-100 photo license other versions 1st-century works Intaglios 1st c Amethyst objects Apollo kitharoidos Reliefs of Nero Ancient Roman glyptics in the Cabinet des médailles Paris Trésor de Saint-Denis |