Бежецкий район
On July 12, 1929 the governorates and uyezds were abolished. Kesovsky District, with the administrative center in Kesova Gora, was established within Bezhetsk Okrug of Moscow Oblast. Shortly afterwards, the district was renamed Kesovogorsky. On July 23, 1930, the okrugs were abolished, and the districts were directly subordinated to the oblast. On January 29, 1935 Kalinin Oblast was established, and Kesovogorsky District was transferred to Tver Oblast. On February 13, 1963, during the abortive Khrushchyov administrative reform, Sonkovsky District was merged into Bezhetsky District, but on January 12, 1965 it was re-established. In 1975, Kesova Gora was granted urban-type settlement status.