Social developments accompanied by time force both cit- ies and their spaces to change or transform. In this change and transformation, only the needs and conditions of the day are taken into account; places are rapidly being torn from their past. While intervening in the spaces, the individual and social scale of the spaces are ignored; Its importance in establishing a connection with belonging, identity and the past and its impact on collective memory are overlooked. The aim of the study is to emphasize that public spaces are vital for collective memory and that intervention approaches to public spaces should be re-examined. For this purpose, Sam- sun Fair, which is the largest public space not only in Samsun but also in the Black Sea Region and the first national fair of the country for the period it served, is discussed. Samsun Fair, with its spatial practices, played a role in the devel- opment of social and cultural life as well as com- mercial life and gained an important place in the urban collective memory. However, the social developments experienced in the process caused the city of Samsun to transform both physically and publicly, as in all other cities in the world. In this context, the study evaluates the Samsun Fair and the situation of the post-transformation area in the collective memory with the data ob- tained from the urban experience. As a result of the study, it has been revealed that the spatial transformation changes the public use and ac- cordingly affects the social values that feed the urban memory. It has been revealed that due to the separation of this place from the city, there are destructions in the collective memory, its continuity is interrupted and a new memory layer cannot be built for this place due to the changing spatial practices over time.