Expo Zaragoza 2008 is an International Exposition regulated by the B.I.E., the French abbreviation for the International Expositions Bureau (Bureau International des Expositions).
The first international exposition took place in London in 1851. Since its success, numerous expositions have been held all over the world, including the Paris Exposition of 1889, which gave birth to the Eiffel Tower. As these events increased in number, a clear need arose to control their frequency. Thus, the Bureau International des Expositions (BIE) was created in 1928.

Election of Zaragoza as the 2008 International Exhibition seat
There are certain differences between the International Expositions, such as the one to be held in Zaragoza, and the Universal Expositions, which are also regulated by the B.I.E.