Sophocles' "Antigone," the climactic play in his Theban trilogy, is set entirely outside the palace gates of Thebes in Ancient Greece. A disastrous rebellion has just led to the deaths of Antigone's brothers.
In the play, Antigone is mourning her brother Polynices, who is to be left unburied as a traitor. In ancient Greece, the unburied dead can never find solace in the afterlife. Most of the play's action takes place as Antigone argues passionately for Polynices' burial. When this fails, she defies her uncle Creon, the new king of Thebes, and buries her brother herself. Creon walls her up to die, also outside the gates of Thebes, and she hangs herself. As written, the action never has to leave the initial setting.