The “non-existent course” is a research project in the aesthetics of human interrelations in the context of critical spatial practice and art in the public sphere. The course advances as a performance, through a dialogic process and a methodology involving dialectical image and montage-fragment construction, that have their origin in Walter Benjamin’s incomplete “Arcades project” (Passagenwerk). Every participant has the task to construct her own variant of the course, which is connected to her own research interest and gradually forms its content and title. Participation in the form of responding work is required for every course session.