In Greek myth, Leda was the daughter of King Thestius of Aetolia. She was the wife of Tyndareus, king of Sparta and the mother of Clytemnestra and Helen of Troy (among others). It is said that Zeus was attracted to her and approached her in the form of a swan. Things then get a little complicated - stories vary as to the offspring of that union; Helen is thought to be one. There was either an egg involved or there was not. The story of Leda has been perpetuated in Art more than by word, with ”Leda and the Swan” being a favourite subject since ancient times.