Considered the most beautiful mortal woman during the Age of Heroes. Helen was the daughter of Zeus and Leda, and her siblings were Castor, Polydeuces (or Pollux), and Clytemnestra. When Helen married Menelaus, the king of Sparta, Helen's father Tyndareus forced the Greek kings to swear an oath to fight for her if she were kidnapped. When she was abducted by (or eloped with) Paris, a prince of Troy, the whole Greek world plunged into the Trojan War. For this reason, Christopher Marlowe had Doctor Faustus refer to Helen as 'the face that launched a thousand ships.'