He’s probably the most famous Chinese artist in the West, but to date, audiences here have had little direct experience of the vast, varied output of Ai Weiwei. Rectification is at hand: on the weekend the Art Gallery of Ontario confirmed it will be the sole Canadian venue next year for a touring retrospective of works by Ai, named “the most powerful figure in contemporary art” by ArtReview magazine in 2011. The Toronto gallery is one of five venues for the exhibition, the first major survey in North America of the Ai oeuvre, including photographs, sculpture, installation pieces and video and audio art. Titled According to What?, the survey begins its tour Oct. 7 at the Smithsonian’s Hirshhorn Museum in Washington, D.C. It travels to the AGO in August 2013