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.
Leda and the Swan were derivative of the compositions mentioned above. The subject remained largely confined to Italy, and sometimes France – Northern versions are rare. After something of a hiatus in the 18th and early 19th centuries (apart from a very sensuous Boucher,), Leda and the Swan became again a popular motif in the later 19th and 20th centuries, with many Symbolist and Expressionist treatments. Also from that era were sculptures of the theme by Antonin Mercié and Max Klinger. Cy Twombly executed an abstract version of "Leda and the Swan" in 1962. It was purchased by Larry Gagosian for $52.9 million at