Oedipus Rex, a Greek tragedy written by Sophocles in the early days of antiquity, is based upon an even more ancient story in Greek mythology. Sophocles, knowing that his audience is aware of the outcome of the play, utilizes that foreknowledge to create various situations in which dramatic and verbal irony play key roles. Through his use of irony, Sophocles manages to avoid simply retelling an old tale, though the audience is cognizant of the story's end they are intrigued by the irony present in the story. For instance, when Oedipus pronounces his curse upon the head of King Laius's murderer in the opening scenes of the play the text says:
             But my curse be on the one who did this, whether he is alone
             Or conceals his share in it with others.
             Let him be free of no misery if he share my house
             Or sit at my hearth and I have knowledge of it.
             On myself may it fall, as I have called it down!
             When Oedipus pronounces this sentence he has already unwittingly judged himself, and the excitement of the crowd foreshadowed later events to come. This statement is a classic example of verbal irony. In it, Oedipus thinks that he is directing his pronouncement upon some bandit, or conspirator, in all actuality he is truly condemning himself. Further examples of irony include his speech when he first answers the chorus "...Because of all these things I will fight for him as I would my own murdered father." The irony inherent in this speech that Oedipus makes to the chorus lies for the most part in this single line since the murdered King Laius is his father.
             Sophocles does not reserve his use of irony to verbal irony, but he also ranges into areas of irony dramatic in nature. The entire play could be said to be an example of this, after all throughout the entire play Oedipus is unaware of the fate that awaits him, even though the viewer is intense
             ...