Spherical structures have been used by mankind since time immemorial in religious and public buildings, as well as in engineering structures. With the development of lightweight design and construction, non-standard architectural and planning solutions are used. More and more frequently they are being successfully implemented in private home projects and becoming a fact of everyday life. This may be explained by certain advantages of the form, as well as by the opportunities offered to the construction industry by the age of new materials and technologies for the works performance. The functional and architectural-structural design of round-shaped buildings in the form of geodesic domes will allow creating comfortable, cost-effective, energy-efficient and environmentally expedient conditions for human habitation taking into account the shortage of land areas and increased demand for alternative housing options due to the environmental situation around the world. This article analyzes the experience of building spherical buildings of different types and scales. The authors present the results of research carried out in the field of the geodesic dome design improvement with the use of wood and polymer materials.

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The analysis of the results of reconstructive design in Leningrad in the 1960s and 70s is summarized in order to use this experience in modern conditions for the renovation of residential quarters of the historical centre of St. Petersburg, as well as to solve the problem of renovation of historical quarters at the city, quarter and object levels. The problems of design and implementation are considered: historical blocks do not meet modern standards of living, insufficient intra-block insolation, lack of sufficient landscaping and Parking spaces, residential buildings that form blocks are overpopulated. The General plan for the development of Leningrad in 1966 indicated the need for protective zoning of the historical centre.

The possibility of partial renovation of the historical center of Tula – Tula Kremlin is discussed. The formation of atrium space in the North-Western part of the Kremlin is considered. This conversion recreates the lost historical integrity of the ancient ensemble and creates new possibilities of use of the historic center of the ancient Russian town. Initially, the urban space of the Tula Kremlin was limited by a wall, but with the lapse of time, the city went beyond that boundary. Initially, the Kremlin had all the fullness of urban functions, but the majority of these functions have been gradually lost, it evolved primarily in a large public center, and nowadays it has become an object of museum-tourist destination. The concept of "Kremlin" includes as a mandatory component outlined urban space, formation of which complies its own laws in the interaction of many different factors: system of spatial and visual relations, temples, city gates and towers. The reconstruction of historic integrity of ancient ensembles was begun within the framework of the Federal State Program, possible ways of its recovery are considered.