The third in a trilogy of Theban plays, written shortly before the death of Sophocles, Oedipus At Colonus depicts the end of Oedipus' life.

Oedipus was a mythical Greek king of Thebes. A tragic hero in Greek mythology, Oedipus fulfilled a prophecy that said he would kill his father and marry his mother, and thereby brought disaster on his city and family. The story of Oedipus is the subject of Sophocles's tragedy Oedipus the King, which was followed by Oedipus at Colonus and then Antigone. Together, these plays make up Sophocles's three Theban plays contained herein. Oedipus represents two enduring themes of Greek myth and drama: the flawed nature of humanity and an individual's powerlessness against the course of destiny in a...

Theban plays
The Theban plays consist of three plays: Oedipus the King (also called Oedipus Tyrannus or by its Latin title Oedipus Rex), Oedipus at Colonus and Antigone. All three plays concern the fate of Thebes during and after the reign of King Oedipus. They have often been published under a single cover. Sophocles, however, wrote the three plays for separate festival competitions, many years apart. Not only are the Theban plays not a true trilogy (three plays presented as a continuous narrative) but they are not even an intentional series and contain some inconsistencies among them....

The Oedipus Plays of Sophocles:
Oedipus the King; Oedipus at Colonus; Antigone
Oedipus the King
Oedipus the King, also known by its Latin title Oedipus Rex, is an Athenian tragedy by Sophocles that was first performed about 429 BC. It was the second in order of Sophocles's composition of his three Theban Plays dealing with Oedipus. Thematically, however, it was the first in the plays' historical chronology, followed by Oedipus at Colonus and then Antigone.
Oedipus the King tells the story of Oedipus, a man who becomes the king of Thebes, whilst in the process unwittingly...

Plays of Sophocles - The Theban Plays - OEDIPUS THE KING - OEDIPUS AT COLONUS - ANTIGONE. The most famous tragedies of Sophocles feature Oedipus and also Antigone: they are generally known as the Theban plays, although each play was actually a part of a different tetralogy, the other members of which are now lost. Sophocles influenced the development of the drama, most importantly by adding a third actor, thereby reducing the importance of the chorus in the presentation of the plot. He also developed his characters to a greater extent than earlier playwrights such as Aeschylus. The Theban...