The purpose of this study is to consider the way of effective utilization of the historic constructions in Italy. To investigate how the spaces have been transformed to be adapted for the public use, this research focuses on the spatial composition in the re-utilized curtyards in the historic area in Milan. Analyzing typologically the ways of arranging such spatial compositions, 6 types of spatial compositions are identified. In conclusion, the courtyards with continuities of streets are used for commercial shops or exhibition space. On the other hand, the courtyards composed internally without connection of street are used for educational activities or offices.
