Cassiopeia (constellation) other among the stars, along with Andromeda. She was placed in the sky as a punishment after enraging Poseidon with the boast that her daughter Andromeda was more beautiful than the Nereids or, alternatively, that she herself was more beautiful than the sea nymphs. She was forced to wheel around the North Celestial Pole on her throne, spending half of her time clinging to it so she does not fall off, and Poseidon decreed that Andromeda should be bound to a rock as prey for the monster Cetus. Andromeda was then rescued by the hero Perseus, whom she later married.
The Sea Monster bring motifs together in a single image. The abduction of a woman by a water-god is one of the oldest Greek mythological conceptions and a subject that fascinated men through to the Renaissance. Dürer adds a layer of complexity to the scene in that the woman does not seem too upset at her fate. Vasari gave an early description of the work, through a vague description of a picture of a nymph set in the ancient world. Recent interpretations mention the abduction of Scylla by the sea demon Glaucus, or the abduction of Hesione by a monster. Further speculation centres