In recent years the art world has seen a proliferation of biennials. Does this represent a series of alternatives to traditional centres such as Venice or the creation of a new canon of contemporary international art? Against the backdrop of the Liverpool Biennial and Documenta 11 in Germany, a panel of experts including New York curator Kellie Jones will address these issues. Other speakers: Adam Nankervis, co-director of London Biennale, Will Bradley of The Modern Institute, Glasgow