Ancient Greek literature
Seven works of Sophocles have survived, the most acclaimed of which are the three Theban plays, which center around the story of Oedipus and his offspring. The Theban Trilogy consists of "Oedipus the King", "Oedipus at Colonus", and "Antigone". Although the plays are often called a "trilogy," they were actually written many years apart. "Antigone", the last of the three plays sequentially, was actually first to be written, having been composed in 441 BC, towards the beginning of Sophocles's career. "Oedipus the King", the most famous of the three, was written around 429 BC at the midpoint of Sophocles's career. "Oedipus at Colonus", the second of the three plays chronologically, was actually Sophocles's last play and was performed in 401 BC, after Sophocles's death.
Oedipus
Due to the popularity of Sophocles's "Antigone" (c. 442 BC), the ending (lines 1005–78) of "Seven against Thebes" was added some fifty years after Aeschylus' death. Whereas the play (and the trilogy of which it is the last play) was meant to end with somber mourning for the dead brothers, the spurious ending features a herald announcing the prohibition against burying Polyneices, and Antigone's declaration that she will defy that edict.