Helen was a figure in Greek mythology said to have been the most beautiful woman in the world. She was believed to have been the daughter of Zeus and Leda or Nemesis, and the sister of Clytemnestra, Castor, Pollux, Philonoe, Phoebe and Timandra. She was married to King Menelaus of Sparta. Her abduction by Paris of Troy was the most immediate cause of the Trojan War.