Apollo was one of the most important gods of the Olympians and he was credited as god of many things. He was god of light, of inspiration, reason, poetry, prophecy, music and arts, medicine and healing. Twin brother of Artemis, he was son of Zeus and Leto. His symbols included the sun, raven, mouse, and lyre. The lyre was a music instrument created by Hermes and gifted to Apollo as a token of his affection.