CassiopeiaKassiopeia

The wife of Kepheus (Cepheus) and mother of Andromeda; she and Kepheus ruled Ethiopia.

Kassiopeia boasted that her lovely daughter, Andromeda, was more beautiful than the immortal Nereids; the Nereids were insulted by such immodest boasting and prevailed on Poseidon (lord of the Sea) to send one of his ketos, i.e. sea monsters, to lay waste to Ethiopia; when Kassiopeia and Kepheus consulted an oracle they were told that if Andromeda was sacrificed to the Immortals the devastation could be averted; with no other alternatives, Kassiopeia and Kepheus prepared to sacrifice Andromeda and save their land from certain destruction; at this opportune time, Perseus was returning from his battle with the Gorgons and had the severed head of Medusa in his kibisis; he confronted the ketos and, with the magical powers instilled in the head of Medusa, turned the beast to stone and saved Andromeda.