THE MOUSAI (Muses) were the goddesses of music, song and dance, and the source of inspiration to poets. They were also goddesses of knowledge, who remembered all things that had come to pass. Later the Mousai were assigned specific artistic spheres: Kalliope (Calliope), epic poetry; Kleio (Clio), history; Ourania (Urania), astronomy; Thaleia (Thalia), comedy; Melpomene, tragedy; Polymnia (Polyhymnia), religious hymns; Erato, erotic poetry; Euterpe, lyric poetry; and Terpsikhore (Terpsichore), choral song and dance.