MILANO EXPO 2015 FROM 1 MAY TO October 31, 2015 The Expo is a Universal non-commercial (it is therefore a fair) , organized by the nation that has won a race application and involves the participation of other nations invited through channels diplomats from the host country. The first Expo was held in London in 1851 and its success has prompted other nations to hold similar events , such as Expo in Paris in 1889 for the creation of the Eiffel Tower . Each Expo is dedicated to a topic of universal interest . The Expo takes place at a site specially equipped and is an opportunity to meet and share a unique experience that promotes the participants and visitors through knowledge and testing innovative theme . The role of the Expo more than expose the most promising new technologies is oriented interpretation of the collective challenges which humanity is called to respond . The international body that regulates the frequency, quality and conduct of the exhibition is the Bureau International des Expositions ( BIE ), born under an international convention signed in Paris in 1928.