In theatre, ‘co-presence’ refers to the simultaneous presence of actors and audience during a performance. It is, however, also suitable for describing cultural diversity in social space. Moreover, because theatre is centrally defined by co-presence, it seems particularly predestined to respond to and itself influence social processes and experiences of cultural co-presence. The conference will explore European theatre’s responses to the challenges of social co-presence in past and present: canon and co-presence; theatre and displacement; cross-border, intercultural, multilingual and participatory theatre; theatre with digitally connected or completely absent audiences; intertextuality and intermediality in theatre work are among the topics at the centre of the lectures. The conference brings together international researchers with theatre professionals.