Abstract. The multifaceted problem of the relationship between the old and the new in the structure of cities subject to reconstructive transformation covers not only the range of tasks for the integration of historically composed and new buildings, but also a number of ambiguous issues of architectural revaluation of historical architectural and urban planning substance. lost elements to improve the aesthetic value of the urban environment and further preserve its integrity. If the solution of issues of urban coherence of historical and new buildings is based on the variability of the respective location in the urban structure of urban formation, the ways of architectural revaluation are based on the principles of volumetric and tectonic perfection of historical substance. ensembles, often by means of finely tempered harmonization of old and new architectural solutions (Hereditary development of compositional and spatial features of the city center). European urbanism of the twentieth century. He also knows cases of architectural revaluation of large urban complexes, such as in the process of restoration after the military destruction of the historic areas of Warsaw and Gdansk, where the problem of restoring the architectural integrity of buildings was combined with issues of restoration, reconstruction, modernization and necessary rehabilitation. on the legitimacy of such revaluation measures, which were not based on the restoration of authentic historical heritage, but in fact on its reproduction "from the ground up", based not only on scientifically sound materials, but often on architectural conjecture, method of analogues, etc. The controversy over the architectural revaluation of historic buildings began in the late nineteenth century, when the issues of conservation and restoration in a set of reconstructive urban planning tasks began to require immediate resolution. Renowned British art critic John Ruskin, reacting sharply to the imperfections of restoration work that led to significant distortions and even distortions of valuable historical substance in various countries, said: «Reproduction from nothing of something that was once great and beautiful in architecture is as impossible as return to life…» (Рёскин 81–82).