The squares of Beijing and Lhasa: art historian Wu Hung deconstructs Tiananmen Square's many images of authority, from the Martyrs' Memorial where Mao laid the foundation stone to the clock that counted down to the handover of Hong Kong. At the other end of China, in Lhasa, the tyranny of the square has been imposed with double force. The ancient Tibetan capital was a warren of streets between "two concentric circles." Today's pilgrims on the inner circuit emerge on to a new Chinese square built in the 1980s when Tibet was "opened up."
Can you think of any strong authority which is expressed by curves, circles?