ABSTRACT
The article is a continuation of a series of articles devoted to the study of the building system of the historical center of St. Petersburg. On the example of some fragments of historical buildings (zones of Morskaya streets, Troitskaya Street, Malaya Kolomna), a historical and urban planning analysis of the formation of the development of St. Petersburg is carried out; the main parameters of the planning and architectural-compositional component of the historical and urban genetic code are identified; a comparative analysis of the studied zones is carried out.
