Leading Chinese conceptual artist Ai Weiwei is not generally known for interactive art, but his contribution to the 2007 Dokumenta Kassel certainly bordered on the genre by requiring the participation of 1001 fellow Chinese.
Named Fairytale, those chosen were flown out to Germany and housed in purpose-built accommodation for the duration of the show.
While encouraged to explore the exhibition, they were at liberty to do whatever they wished, although had to remain in Kassel itself.
Participants were selected both on the basis of their answers to a questionnaire, and the diversity of their backgrounds: Weiwei's intention was "to bring China's current social condition to Kassel and thus allow Westerners to view a sample of modern Chinese society."
The situation was, of course, reciprocal, with the visitors - most of whom had never set foot outside China - able to experience life in a German city before their return.