BREGENZ, AUSTRIA - JULY 15: Giant letters reading 'Free Ai Weiwei' are seen on top of the roof of Kunsthaus Bregenz on the opening night of an exhibition that focusses on the architectural work of the Chinese artist on July 15, 2011 in Bregenz, Austria. Chinese authorities have released Ai Weiwei from detention though have thus far refused to grant him permission to travel. (Photo by Johannes Simon/Getty Images)
Artist Ai Weiwei's cool creations
China's most famous artist and outspoken dissident, Ai Weiwei, is featured in the 55th International Venice Biennale with selected works from his S.A.C.R.E.D. exhibition series.