In the context of visual arts "appropriation" refers to borrowing, quoting or altering the work of others. Originally understood as incorporating everyday objects or aspects of the "real world" as well as blending different artistic disciplines, the term "appropriation art" came into common use during the 1980ies. As the term suggests, appropriation art borrows common images from advertising, the mass media and elsewhere, places them in new contexts and, thereby, aims to change the way we think about these images. It is used to describe practices of challenging the ideas of originality, drawing attention to relations between power, gender and creativity, consumerism and commodity value, the social sources and uses of art. In this session we are going to research the theoretical impact of appropriation with a specific focus on its collaborative aspects.