This article reconstructs the key passages of the theory of theatre elaborated by French philosopher Alain Badiou. A particular attention is dedicated to four texts: Rapsody for the theatre (the heftiest of the eight essays included in the collection), in which it is enunciated the veritative power of the theatre – onto which scene the encounter between the textual eternity and the scenic instant gives life to events of thought; the programmatic essays Ten thesis on the theatre and Antithesis of the theatre, which explicitly renders the terms of the crucial relationship between truth and art. The sheer originality of Badiou’s heterodox re exion on theatre is the result of a distance from the principles of the theatre of direction and from t...