Photos: Art by Chinese artist Ai Weiwei
Members of the media walk on ceramic seeds, during the launch of Chinese artist Ai Weiwei's "Sunflower Seeds" at the Tate Modern in south London, on October 11, 2010. The installation is made up of around 100 million individually crafted ceramic 'seeds' that have been laid out over the floor of the gallery's 1000 square metre Turbine Hall. AFP PHOTO/LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images)LEON NEAL/AFP / Getty Images
LONDON, ENGLAND - OCTOBER 11: A child sits with her mother on Chinese Artist Ai Weiwei's Unilever Installation 'Sunflower Seeds' at The Tate Modern on October 11, 2010 in London, England. The sculptural installation comprises 100 million handmade porcelain replica sunflower seeds. Visitors to the Turbine Hall will be able to walk on the work - which opens on October 12, 2010 and runs until May 2, 2011. (Photo by Peter Macdiarmid/Getty Images)Peter Macdiarmid/Getty Images
A visitor looks at Ai Weiwei's "Circle of Animals/Zodiac Heads" at Somerset House in London May 11, 2011. The exhibition which comprises of 12 bronze animal heads recreated from traditional Zodiac sculptures, is on view from May 12 to June 26.ANDREW WINNING/Reuters
Part of a series by Chinese artist and activist Ai Weiwei entitled "Circle of Animals/Zodiac Heads" on display at Somerset House in London.Reuters
"Rooster", part of a series by Chinese artist and activist Ai Weiwei entitled "Circle of Animals/Zodiac Heads" on display at Somerset House in London.Reuters
Chinese artist Ai Weiwei's marble sculpture "Surveillance Camera", displayed at Lisson Gallery in London.
Chinese artist Ai Weiwei's "Moon Chest", displayed at Lisson Gallery in London.
"Divina Proportione" by Chinese artist and activist Ai Weiwei on display at the Lisson Gallery in London.
Chinese paramilitary police stands guard as athletes walk past the Olympic National Stadium "Bird Nest" during the Race Walking Challenge in Beijing, China, Friday, April 18, 2008. The race walking is the first event held at the National Stadium, ahead of the Olympic Games this August. (AP Photo/Andy Wong)ANDY WONG/The Associated Press
BEIJING, CHINA - JUNE 20: (CHINA OUT) Workers work at the construction site of the National Olympic Stadium on June 20, 2006 in Beijing, China. The main body of the National Olympic Stadium for 2008 Olympics, dubbed the "bird nest" because of its unique design, will be finished at end of this year, according to local media. (Photo by China Photos/Getty Images)China Photos/Getty Images
The Bird Nest National Stadium lit up for a rehearsal of the opening ceremony is reflected in a pool of water in Beijing, China, Wednesday, July 16, 2008. Full dress rehearsals are conducted under a cloak of secrecy ahead of one of the most anticipated summer Olympic Games. (AP Photo/Ng Han Guan)Ng Han Guan/The Associated Press