The Muses (Ancient Greek: Μοῦσαι, romanized: Moûsai, Greek: Μούσες, romanized: Múses) were the nine Greek goddesses who presided over the arts, including music and literature. A shrine to the Muses was called in Latin a Museum (which came to mean "a place for learned occupation").
An artist or poet about to begin work would call on a particular Muse for inspiration, and a poem itself might begin with such a call; thus, Homer's Odyssey begins, "Sing to me of the man, Muse" (that is, of Odysseus).
Today, a muse may be one's special creative spirit, but some artists and writers have also chosen living human beings to serve as their muses.