Expo 2000 was a World Expo held in Hanover, Germany from 1 June to 31 October 2000. It was located on the Hanover Fairground, which is the largest exhibition ground in the world. Initially some 40 million people were expected to attend the exhibition over the course of months; however, eventually with less than half of this number, the Expo was a flop and turned out to be a financial failure.

A world's fair, also known as a universal exhibition or an expo, is a large global exhibition designed to showcase the achievements of nations. These exhibitions vary in character and are held in different parts of the world at a specific site for a period of time, typically between three and six months.