Helen of Troy refuge with Leda. The swan gained her affection, and the two mated. Leda then produced an egg, from which Helen emerged. The First Vatican Mythographer introduces the notion that two eggs came from the union: one containing Castor and Pollux; one with Helen and Clytemnestra. Nevertheless, the same author earlier states that Helen, Castor and Pollux were produced from a single egg. Pseudo-Apollodorus states that Leda had intercourse with both Zeus and Tyndareus the night she conceived Helen. On the other hand, in the "Cypria", part of the Epic Cycle, Helen was the daughter of Zeus and the goddess Nemesis.
Helen of Troy a remarkable challenge. The story of Zeuxis deals with this exact question: how would an artist immortalize ideal beauty? He eventually selected the best features from five virgins. The ancient world starts to paint Helen's picture or inscribe her form on stone, clay and bronze by the 7th century BC. Dares Phrygius describes Helen in his "History of the Fall of Troy": "She was beautiful, ingenuous, and charming. Her legs were the best; her mouth the cutest. There was a beauty-mark between her eyebrows." Helen is frequently depicted on Athenian vases as being threatened by Menelaus and fleeing from him.