Ai Weiwei is one of China’s leading artists. He’s perhaps the nation’s best-known artist internationally. The Beijing National Stadium, the centerpiece venue of the 2008 Olympics Games and dubbed the “Bird’s Nest,”  was designed by Weiwei and built by architects Herzog and de Meuron.

Weiwei has been a politically controversial figure within China for years, but has recently run further afoul of the Chinese government to the point where, as the New York Times reports, he has been detained for “economic crimes.”

Below is an image of a 2009 installation artwork by Weiwei in at the influential “According to What?” exhibition in Beijing.