The Porticoes of Bologna: Methodology for sustainable restoration

The restoration, in this specific case, should be understood in the broadest sense of its meaning: no more, therefore, the restoration of a single monument, but the restoration of an urban tissue, the historical centre of Bologna, that counts about 38 kilometres of porticoes built since the XI century; many of them could be considered as examples of vernacular architecture. The research proposes methodological criteria of inter-vention based on the different types of flooring present in the local building situation in relation to their spe-cific conditions of degradation. The courses of action with their operational indications, indifferent to the con-cept of distinction between greater or lesser architectures, are proposed as a cultural act for the protection and enhancement of the entire urban heritage.