Kalininsky District
In 1928, the area belonged to Tverskoy Uyezd of Tver Governorate. On July 12, 1929 the governorates and uyezds were abolished. Tverskoy District, with the administrative center in Tver, was established within Tver Okrug of Moscow Oblast, and the area was transferred to Tverskoy District. On July 23, 1930, the okrugs were abolished, and the districts were directly subordinated to the oblast. On November 20, 1931 Tver was renamed Kalinin, and consequently Tverskoy District was renamed Kalininsky District. On January 29, 1935 Kalinin Oblast was established, and Kalininsky District was transferred to Kalinin Oblast. In 1990, Kalinin Oblast was renamed Tver Oblast.