Andromeda, a mythical princess, daughter of Cepheus the Ethiopian king and Cassiopea. Her mother having boasted that the beauty of her daughter surpassed that of the nereids, the latter prevailed on Neptune to afflict the country with a deluge and a sea monster. The oracle of Amnion promised that if Andromeda was surrendered to the monster, Ethiopia should be released. The princess was chained to a rock by the shore, and rescued by Perseus, who slew the monster and married Andromeda. Phineus, to whom she had previously been promised, attempted during the celebration of the nuptials to slay Perseus and carry off the bride, but was himself killed with all his associates. After her death, Andromeda was translated to the firmament and placed among the stars.