This chapter shows how the festival of the Great Dionysia is a major political event in the Athenian calendar, which proclaims its roots in the democratic polis at all levels of its organization and practice. Political theory's appropriation or refusal of ancient drama will depend in part on its description of the institution of theatre as political. The festival of the Great Dionysia, the major occasion for tragedy and comedy in the polis, was the largest formal collection of citizens in the calendar. There are several plays which have become mainstays of writing on political thought because of their express content. The chapter discusses two exemplary works in more detail where and how political argument, political thought, and political theory can be located. The two of the most commonly discussed works are: Aeschylus Oresteia and Sophocles' Antigone, both of which have long held centre stage in the discussion of tragedy and political theory.