A world’s fair, world fair, world exposition or universal exposition (sometimes spelled expo for short) is a large public exhibition. These exhibitions vary in character and are held in varying parts of the world. The next World’s fair will be Expo 2015 in Milan, Italy. The main attractions at world’s fairs are the national pavilions, created by participating countries. At Expo 2000 Hanover, where countries created their own architecture, the average pavilion investment was about €13 million.