In another work in this style, a goddess rests her head in her hand, which she rests on the back of a chair of a man in a white toga, who holds a scroll.
One work in this style appears to be a response to a Zeuxis painting of a creature teasing its suckling children with a lion cub by instead depicting a roaring leopard, which threatens the central figure, a centaur, who stands atop the corpse of a lion, on the verge of using a boulder to crush a tiger, which has just killed a centauress. That work in this style was found in Hadrian's villa in Tivoli. In another work in this style, a goddess rests her head in her hand, which she rests on the back of a chair of a man in a white toga, who holds a scroll. That work in this medium is a portrait of Vergil. A man in a yellow hood stretches backward to reach toward a man who has pierced a yellow-tuniced man with a spear in another work in this medium; that work in his medium depicts Darius's chariot fleeing at the Battle of Issus from Alexander the Great. For 10 points, identify this artistic medium, which uses assemblages of small pieces of stone, glass, or ceramic to create images and patterns. 
One work in this style appears to be a response to a Zeuxis painting of a creature teasing its suckling children with a lion cub by instead depicting a roaring leopard, which threatens the central figure, a centaur, who stands atop the corpse of a lion, on the verge of using a boulder to crush a tiger, which has just killed a centauress.
Mosaics