Chicago has had prior experience with Olympic bids. In 1901, the city was unanimously chosen by the IOC to stage the 1904 Summer Olympics, but the Games were moved to St. Louis to coincide with the 1904 World's Fair. Chicago also bid for the 1952 and 1956 Summer Olympics, without success. Mayor of Chicago Richard M. Daley visited Beijing – host city of the 2008 Summer Olympics – on May 15, 2006, where he collected information on hosting. The bidding process for the 2016 Summer Olympics was officially launched on May 16, 2007.