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.
Sophocles
Only two of the seven surviving plays can be dated securely: "Philoctetes" (409 BC) and "Oedipus at Colonus" (401 BC, staged after Sophocles' death by his grandson). Of the others, "Electra" shows stylistic similarities to these two plays, which suggests that it was probably written in the latter part of his career. "Ajax", "Antigone" and "The Trachiniae" are generally thought to be among his early works, again based on stylistic elements, with "Oedipus Rex" coming in Sophocles' middle period. Most of Sophocles' plays show an undercurrent of early fatalism and the beginnings of Socratic logic as a mainstay for the long tradition of Greek tragedy.