Калининский район
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. 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. During World War II, most of the area of the district was briefly occupied by German troops. By the end of December 1941, the district was back under control of the Soviet authorities. In 1990, Kalinin Oblast was renamed Tver Oblast.