Poseidon's punishment: Cassiopea as a constellation sitting in the heavens tied to a chair. Hyginus, Poeticon Astronomicon. "U.S. Naval Observatory Library"
Cassiopeia (Κασσιόπεια) or Cassiepeia (Κασσιέπεια), a figure in Greek mythology, was queen of Aethiopia and wife of king Cepheus. She was arrogant and vain, characteristics that led to her downfall. Her name in Greek is Κασσιόπη, Kassiope; other variants are Κασσιόπεια, Kassiopeia and Κασσιέπεια, Kassiepeia.