Historical reference: Do not rely on this information. It is very old. About this collection
Andromeda, daughter of Cepheus, King of AEthiopia, and of Cassiopeia. The latter disputed the palm of beauty with the Nereids, and thus provoked Poseidon, who sent a sea-monster to devastate the realms of Cepheus. Andromeda was chained to a rock as a propitiatory victim, but Perseus slew the brute, rescued the princess, and was rewarded with her hand. Andromeda after death was, like her mother, enrolled amongst the constellations.