Keyword: «rampart and moat of 1688»

The article discusses the experience of using the plan of Tobolsk in 1806, compiled by land surveyor V. Filimonov, in the implementation of historical and archaeological research. In 2018, during the historical and cultural examination of the land plots allocated for water supply in the foothills of the city, the plan was used to assess the state and nature of the distribution of the cultural layer in the 17th – 19th centuries. For this, the digital linkage was made of the 1806 plan to the modern city plan using the MapInfo geodetic system. Comparison showed that the absence of an early cultural layer in some of surveyed sites (for example, on 1st Sovetskaya St.) is consistent with the plan of V. Filimonov, in which they went beyond residential quarters. The southern sections of the survey (2-ya Trudovaya St., 2nd Rechnaya St.) on the 1806 plan were located in close proximity to the coastline, which suggests that the Irtysh was closer to these streets than now. The state of the cultural layer on in this region suggests that the settlement of this part of Tobolsk occurred quite late – at the end of the 20th century. For the upland part of the city, the comparison of modern buildings with the plan of the beginning of the XIX century. Allowed us to consider the hypothesis about one of reasons for the destruction of the house on the street Oktyabrskaya, 55. Analysis showed that the line of the defensive rampart and the moat of 1688 ran where the northern wing of the structure is located. According to our version, one of the reasons for such a catastrophic situation could be the laying of foundation over a covered moat. Uneven shrinkage of the filling of the moat could cause destruction of building structures.