The first of such exhibition was held in the Crystal Palace in Hyde Park, London in 1851. It was named at that time as "the Great Exhibition of the Works of Industry of All Nations" and rightly so because this exhibition celebrated the coming of age of the Industrial Revolution in Europe. Thus the 1851 Great Exhibition was not only a trade fair but also a display of scientific, industrial and technological inventions. Queen Victoria's consort, Prince Albert, possibly did not foresee that what he conceptualised would become today's third grandest event after the FIFA World Cup and the Olympic Games, considering its impact on culture, on society and the nation's economies.
Today, the World Expo has come a long way. It is not only a trade fair and a showcase of new scientific and technological advances and inventions but it is also a means of promoting cultural correspondence and transfer and a way of finding solutions to issues that hound humanity. Moreover, it becomes a platform of presenting a strong national image before the whole world. In other words, it affords countries to advertise their assets and perceived advantages over other nations. The pavilions that each country construct have become competitive in terms of lavishness, splendor, magnificence and cost. There is a contest as to who builds the most stunning and most memorable pavilion. So many World Expo historians are of the opinion that the geodesic dome of the US pavilion in the 1967 expo in Montreal, Canada is the most memeorable and the glass and iron Crystal Palce of UK in the 1851 World's Fair in London as the most imposing. In each world expo, all countries try to express some theme via its architectural design and the contents of its pavilion Thus each World Expo is characterised by glitter, glamour, visions and images (Maddox 2004, p. 79). The aforesaid themes vary from year to year. Thus in the Century Exposition in Seattle in 1962, the Space Age was celebrated, represented by the 605 feet Space Needle (World Book Encyclopedia 2000, p. 56). Meantime in the 1964-65 World's Fair in New York, the theme was "Peace through Understanding".
It is evident that hosting such world expo is a gargantuan task and needs regulation from countries who might display outre items and exhibits or exhibits that are essentially commercial or of the fine arts. To fill that shoes is the BIE or Bureau International des Expositions, the international sanctioning and regulatory body created by the 1928 Convention on International Exhibitions. The BIE has in one instance rejected a world fair as undeserving of its