LA cura degli interessi dei centri storici. Il centro storico come sistema complesso e come bene comune.

Historic centers are characterized by a high degree of complexity. In the first part of the thesis, an overview of basic knowledge of the regulatory system is given to the reader, by mapping the norms involving the historical centers. To further emphasize the fact that the historic center involves extremely varied interests, many different aspects are analyzed, for example the effects of gentrification, the problem of soil consumption, restructuring incentives, the norms regarding the circulation and parking in historic centers, antipollution measures, in addition to the great theme of the delicate relationship between a site's vitality and the trade protection in historic centers. The second part of the thesis has a constructive and innovative approach. The aim is to induce the reader to look at the historical center from a new perspective, exploiting multidisciplinary concepts. It is required a new methodological approach for this topic, that is to describe the historical center as a complex adaptive system and as a Commons, trying to find a new model for the management of historical centers. In the concluding part of the elaboration is carried out an empirical research of the administrative techniques of management of the historical centers, the research concerns the level of the Italian municipal administrations, in this context a great emphasis is devoted to the important model of the UNESCO Site Management Plans. The UNESCO site reference rules are explained and later the Italian experience is analyzed, special attention is given to the Management Plans of Historic Centers UNESCO sites of the Municipalities of Florence and Siena. Based on these considerations, more general conclusions are taken. For more details, refer to the full text of the PhD thesis.