Question: Around what year was the Greek play that inspired Jean Anouilh's play of the same name written?

Context articles: Eurydice (Anouilh play)
Antigone (Sophocles play)
Léocadia
Traveling Light (1944 film)
Antigone (Anouilh play)
The Lark (play)
Andrew Havill
The Fighting Cock
Tereus (play)
Becket (1964 film)

Eurydice is a play by French writer Jean Anouilh, written in 1941.
 The story is set in the 1930s, among a troupe of travelling performers.
 It combines skepticism about romance in general and the intensity of the relationship between Orpheus and Eurydice with an other-worldly mysticism.
 The result is a heavily ironic modern retelling of the classical Orpheus myth.
 The play has also been performed under the title Point of Departure, a translation by Kitty Black, and on Broadway as Legend of Lovers, in a 1951 production by the Theatre Guild.
Antigone ( ; Ancient Greek: Ἀντιγόνη ) is a tragedy by Sophocles written in or before 441 BC.
Léocadia (Time Remembered) is a play by Jean Anouilh that premiered at the Théâtre de la Michodière in Paris on 2 December 1940.
 It is one of Anouilh's "Pièces roses", together with "Humulus le muet" (1932), "Le Bal des voleurs" (1938), and "" (1941).
 For the occasion, Francis Poulenc composed one of his most celebrated songs, "Les Chemins de l'amour", sung by Yvonne Printemps.
Traveling Light (French: Le Voyageur sans bagage ) is a 1944 French drama film directed by Jean Anouilh, starring Pierre Fresnay and Blanchette Brunoy.
 The narrative is set in 1931, when a man with amnesia tries to recover his memories from World War I, in order to find out what kind of man he really is.
 The film is based on Anouilh's 1937 play with the same title.
Jean Anouilh's play Antigone is a tragedy inspired by Greek mythology and the play of the same name by Sophocles.
 In English, it is often distinguished from its antecedent by being pronounced similarly to its original French form [ɑ̃tiɡɔn], approximately "on-tee-GONE".
The Lark (French: 'L'Alouette" ")" "is a 1952 play about Joan of Arc by the French playwright Jean Anouilh.
 It was presented on Broadway in English in 1955, starring Julie Harris as Joan and Boris Karloff as Pierre Cauchon.
 It was produced by Kermit Bloomgarden.
 Lillian Hellman made the English adaptation and Leonard Bernstein composed the incidental music.
 The two stars of the play reprised their roles in a 1957 television production of the play, as part of the anthology series "Hallmark Hall of Fame".
 A different television adaptation aired in 1958 in Australia.
 There is another English translation by Christopher Fry."
Havill has worked with the Royal Shakespeare Company and was in "The Woman in Black" in London's West End in 1996.
 In the 2000s, his theatre roles included working with Alan Ayckbourn on his play "Virtual Reality"; a West End production of Jean Anouilh's "Ring Around the Moon"; and key roles in director Chris Luscombe's productions of "The Comedy of Errors" and "The Merry Wives of Windsor" at Shakespeare's Globe.
The Fighting Cock is a 1963 Australian TV play.
 It is an adaptation of a play by Jean Anouilh whose original French title was L'Hurluberlu.
 In English, it had a run on Broadway, starring Rex Harrison.
Tereus (Ancient Greek: Τηρεύς , "Tēreus") is a Greek play by the Athenian poet Sophocles.
 Although the play has been lost, several fragments have been recovered.
 Although the date that the play was first produced is not known, it is known that it was produced before 414 BCE, because the Greek comedic playwright Aristophanes referenced "Tereus" in his play "The Birds", which was first performed in 414.
 Thomas B. L. Webster dates the play to near but before 431 BCE, based on circumstantial evidence from a comment Thucydides made in 431 about the need to distinguish between Tereus and the King of Thrace, Teres, which Webster believes was made necessary by the popularity of Sophocles play around this time causing confusion between the two names.
 Based on references in "The Birds" it is also known that another Greek playwright, Philocles, had also written a play on the subject of Tereus, and there is evidence both from "The Birds" and from a scholiast that Sophocles' play came first.
Becket is a 1964 Anglo-American dramatic film adaptation of the play "Becket or the Honour of God" by Jean Anouilh made by Hal Wallis Productions and released by Paramount Pictures.
 It was directed by Peter Glenville and produced by Hal B. Wallis with Joseph H. Hazen as executive producer.
 The screenplay was written by Edward Anhalt based on Anouilh's play.
 The music score was by Laurence Rosenthal, the cinematography by Geoffrey Unsworth and the editing by Anne V. Coates.