The three unities refer to Aristotelian rules for drama that prescribe: 1) the unity of action, where a play should have one main plot with few subplots; 2) the unity of place, where a play should take place in a single location without changing places on stage; and 3) the unity of time, where the events of a play should occur within 24 hours. Aristotle noted that these unities were generally followed in Greek plays since Aeschylus, except for a few cases, though he did not prescribe them as absolute rules. The unity of place was also assumed to keep the chorus, present throughout the performance, from needing excuses to move between locations. Examples given are Sophocles' Oed

1. The Three Unities - Drama
the Aristotelian rules

2. The classical unities or three unities in
drama are:
• The unity of action: a play should have one
main action that it follows, with no or few
subplots.
• The unity of place: a play should cover a single
physical space and should not attempt to
compress geography, nor should the stage
represent more than one place.
• The unity of time: the action in a play should
take place over no more than 24 hours.

3. The unity of time
• The unity of time limits the supposed action to
the duration, roughly, of a single day; unity of
place limits it to one general locality; and the
unity of action limits it to a single set of incidents
which are related as cause and effect, "having a
beginning, a middle, and an end." Concerning the
unity of time, Aristotle noted that all the plays
since Aeschylus, except two, did illustrate such
unity, but he did not lay down such a precept as
obligatory.

4. The unity of place
• Perhaps tacitly he assumed that the
observance of the unity of place would be the
practice of good playwrights, since the chorus
was present during the whole performance,
and it would indeed be awkward always to
devise an excuse for moving fifteen persons
about from place to place.

5. The unity of action
The third unity, that of action, is bound up
with the nature not only of Greek but of
all drama.

6. Examples of the Classical Plays
Sophocles’
•Oedipus the King
•Antigone