Bruce Nauman is one of the most influential post-war artists. In 2009, he was awarded the prestigious Golden Lion at the Venice Biennale. Nauman made his debut as a performance artist in the mid-1960s but his oeuvre is now extremely diverse, including videos, films, installations, drawings, sound compositions, sculptures, graphics, photography and neon sculptures. Yet Nauman always describes himself as a sculptor. This can be explained by the fact that he considers the medium to be of secondary importance in his work. Nauman does not regard an artwork as a finished product. Rather, it is an activity or process in which we, the viewers, are also involved.