Amphion and Zethus fit of madness and became a nightingale. After the deaths of Amphion and Zethus, Laius returned to Thebes and became king. Compare with Castor and Polydeuces (the Dioscuri) of Greece, and with Romulus and Remus of Rome. Plato, "Gorgias", 485e. Amphion and Zethus Amphion () and Zethus (, "Zēthos") were, in ancient Greek mythology, the twin sons of Zeus (or Theobus) by Antiope. They are important characters in one of the two founding myths of the city of Thebes, because they constructed the city's walls. Amphion and Zethus were the sons of Antiope, who fled in shame to Sicyon after
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