Founded in 1906 for the Universal Exhibition and for the opening of the Sempione Tunnel, the Fair of Milan consisted of two separate areas in the city: the current exhibition area and the Parco Sempione. In the pavillions of the first place there were more technical and commercial exhibitions, while Parco Sempione was dedicated to art and science. The buildings of this second location were dismantled to make way for green in the city centre. Even today in the Parco Sempione is located the Aquarium, the last vestige that made up this section of the Fair. The two zones, a couple of miles apart and separated by a railway slipway, were connected by an electric train. In 2005 the Fair moved to Rho-Pero area. The previous area was demolished between 2007 and 2008. The demolished area has given way to an urban redevelopment project involving the creation of Citylife: three towers and a large public park. Today just 11 of the 26 original pavilions (the fair has reached its maximum extension in the period 1997-2006) remained, for a total of 125,000 gross square meters of covered exhibition space located in the heart of the city in addition to the new Rho-Pero area.