This work is a study on the process of «turistification» of small historical centers.
It refers to tourism massification and its effects in recent years.
The research study the process of «touristification» due to the rules of liberalization of economic and commercial activities, that have taken place in Italy and seems to have produced a deterioration in the reality of these centers.
At the same time, it is important to study the role of the public administration, mainly the local one.
In this sense, we applied the research on a case of study: the City of Pienza, verifying by this way the complexity of the subject matter.