They are the daughters of Zeus and Mnemosyne. They are known for the music of their song, which brings joy to any who hear it. There are nine Muses, each with her own specialty: Clio (History), Urania (Astronmy), Melpomene (Tragedy), Thalia (Comedy), Terpsichore (Dance), Calliope (Epic Poetry), Erato (Love Poetry), Polyhymnia (Songs to the Gods), Euterpe (Lyric Poetry).
