Universal Exhibition

The World's Fair is a large global exhibition designed to showcase the achievements of nations, typically held for a period of three to six months. The term "World's Fair" is commonly used in the United States, while the French term "Exposition universelle" is used in most of Europe and Asia. The first World's Fair was held in Prague in 1791, but the first industrial exhibition was the 1851 Great Exhibition in London, which set the basic character of the world fair and influenced the development of several aspects of society. Three eras of world fairs can be distinguished: the era of industrialization, the era of cultural exchange, and the era of nation branding.learn more on wikipedia