and the queen Cassiopeia thank
Perseus for freeing their daughter Andromeda, ''La Délivrance d'Andromède'' (1679)
Pierre Mignard,
LouvreCassiopeia boasted that she (or her daughter
Andromeda), was more beautiful than all the
Nereids, the nymph-daughters of the sea god
Nereus. This brought the wrath of
Poseidon, ruling god of the sea, upon the kingdom of Aethiopia. Accounts differ as to whether Poseidon decided to flood the whole country or direct the
sea monster Cetus to destroy it. In either case, trying to save their kingdom, Cepheus and Cassiopeia consulted an oracle of Jupiter, who told them that the only way to appease the sea gods was to sacrifice their daughter. Accordingly, Andromeda was chained to a rock at the sea's edge and left to be killed by the sea monster.
Perseus arrived and instead killed Cetus, saved Andromeda and married her. ==Constellation==