This work by Chinese artist Cai Guo Chen, which was first exhibited in 2006, has become one of the most famous, controversial and symbolic works of art of the new century. This arrangement, made of 99 wolves in real dimensions, was shown for the first time in Berlin. But what made this work beyond a human concept with political and social associations was that the glass wall in the first version of this arrangement was built in the dimensions of the Berlin Wall blocks and had many signs in it.