Discussion Topic

Oedipus Rex and the Classical Unities


In Oedipus Rex, Sophocles adheres to the Classical Unities of time, place, and action. The play's events occur within a single day (Unity of Time), in one location, Thebes (Unity of Place), and revolve around one central plot—Oedipus's quest to uncover the truth about his origins (Unity of Action).

Expert Answers

An illustration of the letter 'A' in a speech bubbles

Does Oedipus Rex observe the three unities?

Any discussion of the "three unities" in Oedipus Rex invariably includes reference to Aristotle's Poetics as the source of those unities.

In Poetics, Aristotle emphasizes only one unity—the "unity of action"—as absolutely essential to a tragedy.

Aristotle defines a tragedy as " an imitation of an action that is serious, complete, and of a certain magnitude" (Poetics, VI).

The important word regarding the "unity of action" is "complete," meaning that the plot should be self-contained, with a beginning, middle, and end, and that:

the plot, being an imitation of an action, must imitate one action and that a whole, the structural union of the parts being such that, if any one of them is displaced or removed, the whole will be disjointed and disturbed (Poetics, VIII).

It [a tragedy] should have for its subject a single action, whole and complete, with a beginning, a middle, and an end. It will thus resemble a living organism in all its unity (Poetics, XXIII)

In other words, a tragedy has a single, unified plot and no subplots.

Aristotle mentions the "unity of time" only in passing, as an observation, not as a rule.

Tragedy endeavors, as far as possible, to confine itself to a single revolution of the sun, or but slightly to exceed this limit. (Poetics, V)

Aristotle doesn't mention "unity of place" in Poetics at all.

The "three unities" as we understand them are derived from Aristotle's Poetics by French classicists in the seventeenth century. They believed that all serious French dramas should conform to the unities of time, place, and action—a single action occurring in a single place and within twenty-four hours, period.

In time, even these rules were loosened to allow scenes to occur in other locations that could be reached in twenty-four hours.

Nevertheless, Sophocles worked within these three unities in his tragic play Oedipus Rex, although he, like many other playwrights of his time, "pushes the edge of the envelope" regarding each of the unities.

Realistically, in terms of "unity of time," there aren't enough hours in a "single revolution of the sun" to accommodate everything that happens in Oedipus Rex.

Teiresias lives on Mount Telphosion in an area of ancient Greece called Boeotia, approximately twenty miles from Thebes. Oedipus has Creon send for Teiresais, twice and complains about what's taking him so long to get to Thebes:

OEDIPUS. Here too my zeal has nothing lagged, for twice
At Creon's instance have I sent to fetch him,
And long I marvel why he is not here.

Teiresias isn't there yet because he's an old blind man who needs a boy to lead him the twenty miles from his home to the palace, a journey that would easily take a full day for young, sighted man. For Teiresias and the boy—factoring in meal breaks, bathroom breaks, and occasional naps—the trip could take two days or more.

Later in the play, Oedipus sends for the herdsman who took the baby Oedipus to the mountains to die, but nobody knows for sure where he is:

JOCASTA. [A]s soon as he [the herdsman] returned and found
Thee reigning in the stead of Laius slain,
He clasped my hand and supplicated me
To send him to the alps and pastures, where
He might be farthest from the sight of Thebes.
And so I sent him.

The herdsman is in the "alps and pastures" somewhere, "farthest from the sight of Thebes," yet he appears just moments later to tell his story.

Regarding the "unity of place," the physical action of Oedipus Rex occurs in only one place: "in front of the palace at Thebes." Characters come and go from the palace, and the audience never sees them come from or go to anywhere else.

The imaginative action of Oedipus Rex—the action that takes place in the audience's mind—occurs in several locations far from and near to the palace at Thebes.

The audience imagines Creon going to and returning from the Oracle at Delphi, the baby Oedipus being taken into the mountains near Thebes to die, then being adopted by Polybus and Merope in Corinth, Oedipus meeting and killing Laius where three roads meet on his way to Thebes, Jocasta hanging herself in her rooms in the palace, and Oedipus finding her and poking out his eyes with the golden pins from her robe, and so on.

Unity of place isn't simply a theoretical limitation imposed on the ancient Greek tragedies. Even though Sophocles added the third actor to the performance of tragedies, there were still only three actors who had to portray all of the characters in the play, and the physical restrictions of the ancient Greek theaters simply didn't accommodate multiple changes in location. The actors, all three of them, couldn't go anywhere else.

The question of "unity of action" in Oedipus Rex raises one major issue.

The "action" of Oedipus Rex focuses primarily on "Who killed Laius?" However, at the same time that Oedipus and all the other characters are following the "Who killed Laius?" plotline, another issue arises—"Who is Oedipus?"

As the play progresses, the "Who killed Laius?" issue becomes secondary at times to the "Who is Oedipus?" inquiry. A considerable portion of the play is given over to this line of inquiry, even to the extent that the audience might forget that the main plot of the play—the "action" of the play, is supposed to be "Who killed Laius?"

Eventually the "Who is Oedipus?" issue is resolved, which, in turn, resolves the "Who killed Laius?" issue, but the question remains as to which of these represents the true "action" of the play and whether the action of the play is truly unified.

Last Updated on
An illustration of the letter 'A' in a speech bubbles

Does Oedipus Rex observe the three unities?

As other commenters have explained, the three unities described by Aristotle are the Unity of Time (events should take place within a one-day period), the Unity of Place (events should occur in one locale, not many), and the Unity of Action (the drama should focus on one main plot only, without any focus on subplots pertaining to other characters).  

Oedipus Rex adheres to Aristotle's Unity of Time because the events of the play occur within the space of one day. In other words, Oedipus is approached by the Priest of Zeus sometime in the morning, and by evening he has been exiled from Thebes. In fact, events really seem to occur as if in "real time" on stage, though some actions do take place off-stage (e.g. Jocasta's suicide) and are reported by a messenger.

The play adheres to the Unity of Place because everything happens on the palace steps. When Oedipus wishes to speak with someone who is not present, like Teiresias, the blind prophet, or the swineherds later in the play, those individuals are sent for and arrive at the palace to speak with the king. Likewise, before the play began, Oedipus sent Creon to the oracle so that his brother-in-law/uncle can return during this particular day (helping to achieve a Unity of Time) to this particular place (helping to achieve a Unity of Place). Oedipus doesn't go to where anyone else is; he sends for people he needs or he sends people to retrieve the information he wants.

The play adheres to the Unity of Action because everything that happens concerns Oedipus and his immediate investigation into Laius's murder and then his own history and parentage. Neither Jocasta nor Creon, for example, has a subplot or some minor story line of their own that exists simultaneously with Oedipus's.

Last Updated on
An illustration of the letter 'A' in a speech bubbles

Does Oedipus Rex observe the three unities?

As others have mentioned, the three unities in Oedipus Rex are 1) the unity of time, 2) the unity of space, and 3) the unity of action.

This is basically the recipe for the perfect tragedy described by Aristotle and which Oedipus Rex, a tragedy written by Sophocles in 420 B.C., follows. 

1) The Unity of Time: Aristotle felt that a perfect tragedy takes place in the time period of one day. The events in Oedipus Rex take place within a day.

2) The Unity of Space: There should be one setting, or location, in the tragedy. Oedipus Rex takes place entirely in Thebes.

3) The Unity of Action: There should only be one plot. There is only one plot in Oedipus Rex; there are no side plots, no "side stories." The tragedy is that of Oedipus, the King of Thebes, who has fulfilled the dreadful prophecy of killing his father and marrying his mother.

Last Updated on
An illustration of the letter 'A' in a speech bubbles

Does Oedipus Rex observe the three unities?

The three Unities in Greek drama, as described in Aristotle’s rules of poetry in The Poetics, are the Unities of Time, Place, and Action; here, the entire dramatic action of Oedipus takes place in a 24-hour period, since the exposition (the action before the start of the play), such as the confrontation of Oedipus and his father, the marriage to his mother Jocasta, etc., are all discussed as actions happening before the dramatic action begins, but are not acted out on stage.  The entire play takes place at the entrance to Oedipus’ mansion – there are no interior scenes or locations in other cities, etc. (remember, this was before proscenium arches, set changes -- except for perioktoi --, etc.), and the entire dramatic action is Oedipus’ dilemma – there are no subplots or minor character developments/ distractions. Whether Aristotle was prescribing rules or simply describing already existing plays (by Aeschylus, Euripides, etc.) , the Unities became the criteria for "correct" dramatic construction for tragedies until the Renaissance.

Last Updated on
An illustration of the letter 'A' in a speech bubbles

Does Oedipus Rex observe the three unities?

The unities of time, place, and action were derived from Aristotle's Poetics by an Italian theorist, Lodovico Castelvetro, in 1570.

In Poetics, Aristotle proposes the unities of time and action (unity of place isn't mentioned in Poetics) as guidelines rather than actual rules, which are based on what Aristotle observed in Greek tragic plays—not what he intended to impose on the writing of tragic plays. Castelvetro and French classical playwrights like Pierre Corneille, Jean Racine and Jean-Baptiste Poquelin (better known as Molière) interpreted these observations as requirements and adhered to these unities in their plays.

According to Castelvetro, the unity of time imposed a twenty-four hour time limit on the action of the play, the unity of place meant that the action of the play should occur in a single location, and the action of the play be restricted to a single, unified plot line:

Tragedy endeavors, as far as possible, to confine itself to a single revolution of the sun, or but slightly to exceed this limit. (Poetics, part 5)

In Oedipus Rex, the action of the play takes place in a single day. Even events which would take longer than a day, such as Creon's trip to the Oracle of Apollo at Delphi, are reported rather than actually enacted in the play.

Aristotle makes no mention whatsoever about a unity of place in Poetics. This unity was apparently devised by Cornielle as an outgrowth of the other two unities and Castelvetro's writings. The unity of place can also be logically assumed from the actual construction of an ancient Greek theatre, which limited the action of the play to what could reasonably occur in a single location. Nevertheless, Oedipus Rex conforms to this unity, in that the entire action of the play occurs in front of the palace at Thebes.

The only unity which Aristotle seems to have insisted on was the unity of plot, which he considered an integral part of a tragic play:

The Plot, then, is the first principle, and, as it were, the soul of a tragedy . . . [T]he plot, being an imitation of an action, must imitate one action and that a whole, the structural union of the parts being such that, if any one of them is displaced or removed, the whole will be disjointed and disturbed. (Poetics, part 6–8)

Aristotle further imposed on the unity of plot that the action, the events of the play, must have a cause-and-effect relationship:

Tragedy is an imitation not only of a complete action, but of events inspiring fear or pity. Such an effect is best produced when the events come on us by surprise; and the effect is heightened when, at the same time, they follow as cause and effect. . . . Plots, therefore, constructed on these principles are necessarily the best. (Poetics, part 9)

Oedipus Rex is constructed around and driven forward by a single objective: find the person who killed Laius. Every event in the play is focused on this objective, and nothing that occurs in the play is extraneous to this objective. The sometimes surprising events of the play follow a strict cause-and-effect relationship that lead inexorably to the conclusion that the person who killed Laius is Oedipus himself.

Last Updated on
An illustration of the letter 'A' in a speech bubbles

Does Oedipus Rex observe the three unities?

As a previous educator has rightly noted, all three of Aristotle's dramatic unities are present in Oedipus Rex. Indeed, for Aristotle, Sophocles's masterpiece was the paradigm example of how a play should be constructed. The entire action of the play takes place over the course of twenty-four hours in the royal palace at Thebes. The action is itself a unity as it is focused entirely on one single theme—Oedipus's investigation of Laius's death and the terrible truth it reveals.

The three unities, when combined, allow complete economy of expression; everything is extraordinarily concentrated and precise. There are no subplots, no comic relief; all our attention is focused on Oedipus and his terrible fate. At the same time, the simple presence of the three unities is not in itself enough to constitute a great play. Aristotle's unities should be seen rather as a structure, a foundation on which the playwright builds the various elements of his or her drama.

Last Updated on
An illustration of the letter 'A' in a speech bubbles

Does Oedipus Rex observe the three unities?

Aristotle's three unities are unity of place, unity of time, and unity of subject.  Oedipus Rex, Sophocles's tragedy, achieves all three of the Aristotelian unities.  

First, it achieves unity of place because all of the action happens only in one place: in front of Oedipus and Jocasta's royal residence.  Whenever the characters need information, they call someone to them rather than leaving this place; or, when events occur inside, someone comes out to tell the characters.

Second, the play adheres to the unity of time because everything takes place within twenty four hours.  For example, instead of having Oedipus decide to send Creon to the oracle during the course of the play, and then having to wait several days for him to return with his news, Sophocles has Oedipus think ahead and send Creon several days before anyone suggests it; that way, Creon can return at just the right time to deliver his information so that the play can promptly continue.

Third, the play achieves unity of subject by only focusing on Oedipus's tragedy.  There are no subplots or story lines that focus on other characters to distract us from Oedipus's immense pride and tragic end.

Last Updated on
An illustration of the letter 'A' in a speech bubbles

How does Oedipus Rex by Sophocles adhere to the classical unities?

There are three such unities: the unity of time, the unity of place, and the unity of action.

The unity of time means that everything takes place within a space of twenty-four hours or fewer. From the time that Oedipus greets the priest and suppliants who have come with prayerful offerings to the palace of Thebes to the time Oedipus learns the truth about his own parentage, blinds himself, and is exiled, everything takes place within this limited time frame.

The unity of place means that there is just one setting for the entire text. In this case, it is the steps outside the palace. Here, Oedipus greets the suppliants, receives news from the oracle, and so on. Note that Oedipus does not go to the oracle himself but sends Creon. Oedipus has Tiresias, the blind prophet, brought here to him for questioning. No time is lost in travel, and no distractions are created by having the main character traverse these distances. Of course, some events—especially the violent ones (Jocasta's suicide, Oedipus blinding himself with her brooches)—takes place, by convention, off-stage, but someone always comes to this same place to report what has happened elsewhere.

Finally, the unity of action means that the entire subject matter of the text is focused on Oedipus's search for Laius's killer and the subsequent consequences of that search. The priest and suppliants come as a result of the terrible plagues that have beset Thebes, which are the result of the fact that Laius's murderer is still free and unknown; thus begins the search for his murderer. Everything that takes place after this revolves around this search.

Last Updated on
An illustration of the letter 'A' in a speech bubbles

How does Oedipus Rex by Sophocles adhere to the classical unities?

All three of Aristotle’s dramatic unities—at least as they were interpreted by French classical dramatists—are present and correct in Oedipus Rex by Sophocles. Aristotle was a great admirer of Sophocles’s masterpiece and regarded it as a paradigm of how a play should be constructed.

First of all, we have unity of time. The action of the play takes place over the course of a single day. As with the other two unities, this ensures that there is complete economy of expression. No time is wasted in presenting the events as they unfurl on stage. The unity of time means that the audience is concentrated purely and solely on the here and now, as that’s the main focus of the drama.

We also have unity of place. In keeping with the traditional conventions of Greek theater, the action of the play unfurls in one single place, namely the royal palace of Thebes. This means that Oedipus Rex effectively consists of one long scene, which, as with the unity of time, keeps the audience’s concentration firmly fixed on what’s happening right in front of them.

Last but not least, we have the unity of action. There is just one plot—no subplots, no comic relief. Nothing, in fact, that might detract the audience’s attention from what really matters. Even so, the unity of action, like the other two unities, cannot of itself constitute a great play. All that these unities can do is to provide a dramatic structure which the playwright then builds upon, using his or her skills.

Last Updated on
An illustration of the letter 'A' in a speech bubbles

How does Oedipus Rex by Sophocles adhere to the classical unities?

While the "Unity of Place" was simply the necessity of construction for the Greek stage, the only unity that Aristotle insisted upon was the "Unity of Action" although he did state that tragedy must keep its action "within one revolution of the sun," implying that "Unity of Time" is also a requisite to tragedy.

Unity of Place

The action of Oedipus Rex by Sophocles centers around Thebes where the city has been beset with plagues, famines, and fire. As king, Oedipus promises to seek the reason for these punishments; in so doing, he learns that the gods have reacted against the murder of their previous king, Laius. And, tragically, it is revealed that Oedipus has been the murderer. Oedipus punishes himself by blinding himself; then, he has Creon order his exile. ending the play, however, with Oedipus being led into the palace.

Unity of Time

The plot of Oedipus Rex does keep its action within Aristotle's "one revolution of the sun." For, the incidents that lead to the tragedy-- the prophecy that causes Laius and Jocasta to give up their son, the discovery of the baby Oedipus, and the murder of Laius--are all outside the drama proper. It is only the attempt to learn the cause(s) of the problems in Thebes that concerns the drama.

Unity of Action 

All the action of the drama proper revolves around the attempt of Oedipus to find a remedy for the terrible occurrences in Thebes.  He sends his brother-in-law Creon to the Oracle of Apollo in Delphi to learn what causes the fire, famine, and plague in Thebes.  When Creon returns, Oedipus begins his investigation of the death of his predecessor, Laius.  Of course, he learns his own involvement in this death and the consequences of his actions.


In his Poetics, which has become the consummate guideline for tragedy, Aristotle praises Oedipus Rex for having an exemplary, well-constructed plot that takes place with one full day; in addition Aristotle contends that Sophocles's play is one which is capable of inspiring fear and pity not only in its audience but especially in those who have merely heard of the story.  And, part of this impact upon audiences is due to the play's unity of action, as well as unified time and place.

See eNotes Ad-Free

Start your 48-hour free trial to get access to more than 30,000 additional guides and more than 350,000 Homework Help questions answered by our experts.

Get 48 Hours Free Access
Last Updated on