Historical sites are special places which housed the most important cultural heritage of different periods. They can be considered as irreplaceable assets representing the investment of centuries of knowledge and lessons which weave the various physical elements and spatial units together in particular contexts. Many such sites are in a danger of losing their historical aspects if relevant studies are not put in place to measures those aspects. This paper is concerned with the historical aspects in the city of Sanandaj considering two leading questions: What historical aspects the city of Sanandaj contained which gave birth to its character? Theses will be dealt through document analysis, observation of the built form of the city and physical survey of existing built form and its natural context (taking photograph and analytical drawings). The outcome of the case study is that its main structure sprang from the castellated cities, which has the potential for cultural resource-management plans.