The nine Muses are the daughters of Zeus and Mnemosyne, the goddess of memory. Apollo, the leader of the Muses, trained them to sing harmoniously together. Humans prayed to them for a good voice. The Muses can often be found on the Olympus where they entertain the gods; at the fountain Hippocrene; on the mount Helicon; and on Parnassos. Originally they were goddesses of singing, but later also of art and science.
The nine Muses are: Calliope, Clio, Erato, Euterpe, Melpomene, Polyhymnia, Terpsichore, Thalia, Urania. From their name words such as music, museum, mosaic are derived.