Apollo and the Nine Muses, Gustave Moreau, 1856. Oil on canvas, part of a private collection. Apollo is one of the most important and complex of the Olympian deities in Greek and Roman mythology. He has been called a god of light and the sun, truth and prophecy, healing, plague, music, poetry, and more. The Nine Muses of the Greek Mythology were deities that gave artists, philosophers and individuals the necessary inspiration for creation. 1) Clio: discovered history and guitar. 2) Euterpe: discovered several musical instruments, courses and dialectic. 3) Thalia: the protector of comedy; she discovered comedy, geometry, architectural science and agriculture. 4) Melpomene: the protector of Tragedy; she invented tragedy, rhetoric speech and Melos. 5) Terpsichore: the protector of dance; she invented dances, the harp and education. 6) Erato: the protector of Love and Love Poetry-as well as wedding. 7) Polymnia: the protector of the divine hymns and mimic art; she invented geometry and grammar. 8) Ourania: the protector of the celestial objects and stars; she invented astronomy. 9) Calliope: the superior Muse. She was the protector of heroic poems and rhetoric art.