In Greek mythology, Andromeda was the daughter of Cepheus, king of Ethiopia, by Cassiope. Having been promised as a bride to Phineus, her uncle, she became the victim of Neptune's anger after her mother boasted that she was more beautiful than the Nereids. Neptune flooded the land and sent a huge sea-monster to cause mayhem. To appease the sea-god, Andromeda, at the command of the oracle of Ammon, was chained to a rock and given up to the monster. Perseus came to the rescue with Medusa's head, turned the dragon to stone, and liberated and married Andromeda. After her death she was placed in the sky as a constellation.