Formal and Composition Stability of Ekaterinburg Historical Center

Preserving the city structural elements of architectural and urban planning culture, is currently the most important task. It is necessary to achieve a sustainable development, preserve historical heritage and cultivate a careful attitude towards the culture of the Russian Federation. It is important to take into account the morphological integrity of the historically developed urban environment, which is considered through the prism of formal compositional stability. The article presents the analysis of the architectural and urban development to identify the most stable structural elements of Yekaterinburg. Systematic and historical approaches are the methodology of the study, which allows to consistently analyze the extensive material using urban planning and retrospective analysis.The article proposes periodic formation and development of the structural elements of the historical center from the beginning of the city formation to the present, including six periods: pre-reform, post-reform, pre-war period, war and post-war period, developed socialism and perestroika, postSoviet period. Structural elements of the historical center are reconstructed, reflecting the evolution of the formal and composition aspect of the city in each period of its historical development. Lost and most stable structural elements of the city are identified and can be protected as heritage.