Documentary theatre is theatre that uses pre-existing documentary material as source material for stories about real events and people, frequently without altering the text in performance. The genre typically includes or is referred to as verbatim theatre, investigative theatre, theatre of fact, theatre of witness, autobiographical theatre, and ethnodrama.

Erwin Friedrich Maximilian Piscator was a German theatre director and producer. Along with Bertolt Brecht, he was the foremost exponent of epic theatre, a form that emphasizes the socio-political content of drama, rather than its emotional manipulation of the audience or the production's formal beauty.