Chicago has hosted major and historic world gatherings in the past, including the famous 1893 World's Columbian Exposition, the 1933 Century of Progress Exposition and the 1959 Pan American Games, as well as matches for the 1994 FIFA World Cup soccer tournament. Chicago has also hosted the most United States presidential nominating conventions. Chicago was scheduled to host the 1904 Summer Olympics, but the games were instead relocated to St. Louis to coincide with its Louisiana Purchase Exposition, more commonly known as the Saint Louis World's Fair. Chicago was also the first host of the Special Olympics in 1968.