---

Goals:
The Sardar of Bagh-e Melli was the symbol of Tehran for many years. Its current state is the result of events, changes in Visions, and social, cultural, and political changes. This study focuses on the experience of Tehran Beautification Organization to reveal the quality of conservation in valuable monuments of Tehran.
Methods:
The current study is a descriptive-analytic and explorative-field work study. It has tried to triangulate the results of to Make understandable with library studies and document analysis to offer hypothesis in terms of interpretation of hidden elements and features of the monument and provide a proper analysis of the changes and the reasons behind them.
Findings:
Studies show that the monument had four distinct periods of life, the effect of each can be seen as physical changes and interventions in it: 1- Formation as a symbol of power in the bureaucracy of the capital and the country; 2- The period of pause in urban development; 3- The era of ignorance and decline; 4- The rise of historical and symbolic values of the monument in the old Tehran.
Conclusion:
The study answers the questions regarding the formation, changes, and second rise of a monument that was the symbol of Tehran in an era and is considered the face of old Tehran today. In these examinations it became clear how social and political changes affected the rise and focalization of a monument and consequently resulted in its decline. Thus, the value of the said monument in each era makes certain changes permissible or prohibited. Finally, the growing old of previous values and formation of new ones are studied and how this limit intervention in the monument more difficult compared to older taboos.