Synergy of World’s Exhibitions areas and spatial structures of host cities

The organization of the world’s exhibition is for the host city a chance to use this global event to build its image and position in the international arena, its own development by improving the quality of public spaces, cultural facilities, transportation, tourism, etc. Usually extensive, often abandoned, neglected or destroyed by industry areas were used to build Expo sites. In this way they were recovered for the city, contributing to its development. After the exhibition, the city receives areas, equipped with necessary architectural, technical and green infrastructure, and the buildings that continue functioning and longer benefit for the city. A result of this operation is a realization of the assumptions of synergy, as synthesis of energy, expressed by the equation „2+2=5”. Usually, the binders that synergistically bind Expo structures with the city, are uniting them strings or zones of public spaces (e.g. Paris 1889, Barcelona 1929, Seattle 1962), and the inclusion of post-Expo sites into the systems of green areas of the city (e.g. Barcelona 1888, Chicago 1893, 1933, Seville 1929, New York 1939, 1964, Shanghai 2010). But not always effective use of the potential of postExpo areas is a success. Sometimes they have remained isolated islands, which although give an attractive offer of a functional use of space, but through lack of urban synergy with the city, are not able to generate such significant benefits, as in the case of structures synergistically related (np. Seville 1992, Milan 2015). The article shows examples of both, effective and bringing a comprehensive range of benefits for the host city, and also misguided attempts of synergistic relationship between post-Expo areas and spatial structures of cities.