Today's traditional approach to preserving buildings perceives the building as a sacred object and examines it according to parameters of style, technology and historical importance. As a result, the structure is meticulously restored, in accordance with the identification of the historical source as the only authentic source, without taking into account the needs of the present. Through the project I seek to formulate a different approach to intervention in an existing public structure, in the spirit of Foucault's "Genealogy" method, while exposing significant layers and elements that create the "Sense of place" and the local identity. Thus, as a planning method I will preserve the existing building's qualities and at the same time will work against it in order to enhance the site as a "place" that provides a complex human experience, which is not univalent. This approach is demonstrated by a conservation process of the iconic building of the National Library, which is located in the Hebrew University campus in Givat-Ram, Jerusalem, and soon will move to a new facility and leave the current building unused. The project offers an analysis of architectural elements, alongside a phenomenological analysis of main "moments" in the building. In the conservation process, the significant phenomenological moments arising from the original architectural work will be highlighted, simultaneously with the assimilation of new "moments" in the building in accordance with new functions that will be incorporated into it, meeting the current needs of the university campus.