Before [the first world's fair in 1851], ... If you wanted to go to trade fairs, ... well-attended and very diverse kinds of events ...

World's Fairs used to be Olympic-scale events. ... He beat Bain to the first World's Fair in London in 1851, then called the Great Exhibition. An improved version of a facsimile, ...

Expo 2010 Shanghai will be the first World's Fair hosted in China. Set to run from May 1 to Oct. 31, the expo is expected to draw about 70 million visitors from around the world.