Oedipus Rex and that deal with the story of Oedipus, "Oedipus Rex" was the second to be written. However, in terms of the chronology of events that the plays describe, it comes first, followed by "Oedipus at Colonus" and then "Antigone". Prior to the start of "Oedipus Rex", Oedipus has become the king of Thebes while unwittingly fulfilling a prophecy that he would kill his father, Laius (the previous king), and marry his mother, Jocasta (whom Oedipus took as his queen after solving the riddle of the Sphinx). The action of Sophocles' play concerns Oedipus' search for the murderer of Laius in
Oedipus Rex lead him to kill his father and marry his mother. Oedipus "chooses" not to return to Corinth after hearing the oracle, just as he chooses to head toward Thebes, to kill Laius, to marry and to take Jocasta specifically as his bride; in response to the plague at Thebes, he "chooses" to send Creon to the Oracle for advice and then to follow that advice, initiating the investigation into Laius's murder. None of these choices are predetermined. Another characteristic of oracles in myth is that they are almost always misunderstood by those who hear them; hence Oedipus's misunderstanding the significance