Commissioned by the Czech government to mark the Czech presidency of the EU, Entropa was supposed to contain works of art from all 27 EU member states. In fact, it's all been done by Czech artist David Cerny and two associates. The Guardian has a nice picture with its article.
Entropa is causing some commotion. The supposedly collaborative piece has been installed in the headquarters of the European Council of Ministers in Brussels. Bulgaria complained about its depiction as a toilet, prompting Czech artist David Cerny to admit that it's a big hoax.