The purpose of this study is to consider the phenomenon of reutilization of historic constructions in Milan. This paper is to clarify how the choice of the new functions is influenced by the characteristics of the zone and by the architectural volume. The city's properties are classified according to five functions : "business", "exhibition", "commerce", "education", "library". This research points out that the historic constructions in the city center house mainly public officies and exhibitions for tourists. The farther from the center, the more the historic constructions house educational activities and public officies for the local community. In case of large volumes it is usualy preferred to place different functions.
