How many muses are there in greek mythology?

Answer:
There are nine muses, daughters of Zeus and the Titaness Mnemosyne, goddess of memory. Calliope was the oldest, and Muse of Epics and mother of Orpheus; Erato, Muse of Lyrics; Euterpe, Muse of Music; Thalia, Muse of Comedy; Melpomene, Muse of Tragedy; Urania, Muse of Astronomy; Clio, Muse of History; and Polyhymnia, Muse of Hymns. They were trained by Apollo, the god of music.
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