The issues of preserving the urban planning heritage of Russian cities and the proposed methods of its preservation are discussed. The study of the morphology of Russian cities is presented as an example of a scientific approach to the description of the urban environment as a possible object for conservation. The history of the expansion plan and urban planning regulations for Munich, created by Theodor Fischer and based on the task of the morphology of urban space, adopted in 1904 and current for 75 years, regardless of the government in Germany, is described. The plan and regulations became the basis for the development of the city, its restoration after World War II and the preservation of its urban environment.