This paper deals with the problem of the creation of metropolitan cities in the italian experience. The analysis is open by a reflection on the evolution of the urban systems in a worldwide dimension. A particular attention is devoted to the problem of the emergence of a metropolitan strategies in a dimension of local communities separated from an administrative point of view. Author emphasizes the link between a theoretical approach and the normative one, with a particular focus on the Italian experience. The Italian legislation on the topics is discussed and criticized with an analysis of the operational mistakes made by the Italian Parliament. Author claims for a more flexible legislation.