Uyezd with the center of Kimry was established as well. On 25 April 1921, Vesyegonsky and Krasnokholmsky Uyezds were transferred to newly established Rybinsk Governorate. In 1921, there was some minor land exchange between Tver Governorate and Moscow and Rybinsk Governorates. On 23 February 1923, Rybinsk Governorate was abolished, and the uyezds were transferred back to Tver Governorate. On 30 May 1922, Zubtsovsky, Kalyazinsky, and Korchevskoy Uyezds were abolished and merged into Rzhevsky, Kashinsky, and Kimrsky Uyezds, respectively. On 1 August 1927 Novgorod and Pskov Governorates were abolished, and their uyezds were merged into newly established Leningrad Oblast, with the administrative center in Leningrad, which included the northwestern part of Russian Federation. The oblast was subdidived into 140 districts, which were grouped into nine okrugs. The areas which currently belong to Tver Oblast were grouped into Velikiye Luki Okrug with the center in Velikiye Luki. The following districts have been established in Velikiye Luki Okrug, Bologovsky, Idritsky, Ilyinsky, Kholmsky, Kunyinsky, Leninsky, Loknyansky, Nasvinsky, Nevelsky, Novosokolnichesky, Oktyabrsky, Ostashkovsky, Penovsky, Porechyevsky, Pustoshkinsky, Rykovsky, Sebezhsky, Sovetsky, Toropetsky, Troitsky, Tsevelsky, Usmynsky, Ust-Dolyssky, Usvyatsky, Velizhsky, and Velikoluksky. Bologovsky District was established and included into Borovichi Okrug of Leningrad Oblast. On 12 July 1929 Moscow and Smolensk Governorates were abolished as well. Their uyezds formed a number of administrative divisions, and current area of Tver Oblast overlapped with two of them, Moscow and Western Oblasts. Western Oblast had the administrative center in Smolensk. These oblasts were subdivided into okrugs as well. Velikiye Luki Okrug was transferred from Leningrad to Western Oblast; additionally, Rzhev Okrug with the center in Rzhev was established in Western Oblast, and most of its area later entered Tver Oblast. The following districts were established in Rzhev Okrug, Belsky, Kamensky, Karmanovsky, Lukovnikovsky, Molodotudsky, Nelidovsky, Oleninsky, Pogorelsky, Rzhevsky, Selizharovsky, Staritsky, Stepurinsky, Sychyovsky, Vysokovsky, Yeltsovsky, and Zubtsovsky. In Moscow Oblast, three of the okrugs were established in the areas which later formed Tver Oblast. They contained the following districts: Bezhetsk Okrug: Bezhetsky, Kashinsky, Kesovsky, Krasnokholmsky, Maksatikhinsky, Mikhaylovsky, Molokovsky, Sandovsky, Sonkovsky, and Vesyegonsky. Kimry Okrug: Goritsky, Kalyazinsky, Kimrsky, Konstantinovsky, Kuznetsovsky, Leninsky, and Nerlsky. Tver Okrug: Likhoslavlsky, Novotorzhsky, Rameshkovsky, Spirovsky, Tolmachyovsky, Turginovsky, Tverskoy, Udomelsky, Vyshnevolotsky, Yemelyanovsky, Yesenovsky, and Zavidovsky. On 23 July 1930, the okrugs were abolished, and the districts became directly subordinate to the oblasts. On 20 November 1931, Tver was renamed Kalinin. After 1935 On 29 January 1935 Kalinin Oblast was established on the areas