Ahad Nejad Ebrahimi - Assistant Professor, Faculty of Architecture and urbanism, Tabriz Islamic Art University, Iran.

Value literally means to assess the worth of something against something else. The importance ofthe assessment of this word in the economic areas in a few past years has led the recognition of urban values especiallyin their historical parts. It is hypothesis that recognition, assessment, and introducing the existing values in historicalcities have a direct relationship with the selection of the intervention approach in the process of conservation anddevelopment. The purpose of research, considering the mentioned assumption, is to find a response for this question:How do the existing values in historical cities affect the process of selection of the intervention approach This study isa fundamental-theoretical research that has been done by interpretational-historical method and the selection statisticalpopulation are the four cities of Isfahan-Shiraz-Tehran- and Mashhad among Iran’s historical cities in order to specialurban values. Obtained results show identifying and introducing the existing values in historical cities, in past century,has directly been related to the selection the intervention approach in Iran’s cities and regarding cases in which theresults were not proportional to predicted goals, it was because of neglecting the existing values in cities and nonmaterialvalues such as artistic, social, economic, and political values are related to the urban fabric values of historicalcities and the removal of physical values would cause the removal other values of Iran’s cities.

Value and Assessment Value, Urban Values, Iran’s Historical Cities, Interventions of Urban Conservation