| Politburo of the Central Committee |
| 10 [23] Oct 1917 |
Politburo elected by the Central Committee: Bubnov, Zinov'ev, Kamenev, Lenin, Sokol'nikov, Stalin and Trockij |
| Oct 1917 |
Political bureau ceased to function after the success of the Bolshevik coup in Petrograd (25 Oct [7 Nov] 1917) |
| 25 Mar 1919 |
Politburo elected by the Central Committee: full members - Kamenev, Krestinskij, Lenin, Stalin, Trockij; candidate members - Buharin, Zinov'ev, Kalinin |
| Jul - Sep 1919 |
According to an agreement between the Politburo and the Orgburo, chief secretary of the Central Committee Stasova temporarily joined the Politburo from July to Sept 1919 |
| 5 Apr 1920 |
Politburo elected by the Central Committee: full members - Kamenev, Krestinskij, Lenin, Stalin, Trockij; candidate members - Buharin, Zinov'ev and Kalinin |
| 16 Mar 1921 |
Politburo elected by the Central Committee: full members - Zinov'ev, Kamenev, Lenin, Stalin, Trockij; candidate members - Buharin, Kalinin, Molotov |
| 3 Apr 1922 |
Politburo elected by the Central Committee: full members - Zinov'ev, Kamenev, Lenin, Rykov, Stalin, Tomskij, Trockij; candidate members - Buharin, Kalinin, Molotov |
| 26 Apr 1923 |
Politburo elected by the Central Committee: full members - Zinov'ev, Kamenev, Lenin, Rykov, Stalin, Tomskij, Trockij; candidate members - Buharin, Kalinin, Molotov, Rudzutak |
| 21 Jan 1924 |
Lenin died |
| 2 Jun 1924 |
Politburo elected by the Central Committee: full members - Buharin, Zinov'ev, Kamenev, Rykov, Stalin, Tomskij, Trockij; candidate members - Dzeržinskij, Kalinin, Molotov, Rudzutak, Sokol'nikov, Frunze |
| 31 Oct 1925 |
Frunze died |
| 1 Jan 1926 |
Politburo elected by the Central Committee: full members - Buharin, Vorošilov, Zinov'ev, Kalinin, Molotov, Rykov, Stalin, Tomskij, Trockij; candidate members - Dzeržinskij, Kamenev, Petrovskij, Rudzutak, Uglanov |
| 20 Jul 1926 |
Dzeržinskij died |
| 23 Jul 1926 |
Zinov'ev relieved of duties at the Central Committee plenum; Rudzutak elected full member; candidate members re-elected: Andreev, Kaganovič, Kamenev, Kirov, Mikojan, Ordžonikidze, Petrovskij, Uglanov |
| 23 Oct 1926 |
Trockij and Kamenev relieved of duties at the joint plenum of the Central Committee and the Central Control Commission |
| 3 Nov 1926 |
Ordžonikidze relieved of duties at the joint plenum of the Central Committee and the Central Control Commission; Čubar elected candidate member |
| 19 Dec 1927 |
Politburo elected by the Central Committee: full members - Buharin, Vorošilov, Kalinin, Kujbyšev, Molotov, Rykov, Rudzutak, Stalin, Tomskij; candidate members - Andreev, Kaganovič, Kirov, Kosior, Mikojan, Petrovskij, Uglanov, Čubar |
| 29 Apr 1929 |
Uglanov relieved of duties at the Central Committee plenum; Bauman elected candidate member |
| 21 Jun 1929 |
Syrcov elected candidate member at the Central Committee plenum |
| 17 Nov 1929 |
Buharin relieved of duties at the Central Committee plenum |
| 13 Jul 1930 |
Politburo elected by the Central Committee: full members - Vorošilov, Kaganovič, Kalinin, Kirov, Kosior, Kujbyšev, Molotov, Rudzutak, Rykov, Stalin; candidate members - Andreev, Mikojan, Petrovskij, Syrcov, Čubar |
| 1 Dec 1930 |
Syrcov relieved of duties by questionnaire [1] at the Central Committee plenum |
| 21 Dec 1930 |
Rykov and Andreev relieved of duties at the joint plenum of the Central Committee and the Central Control Commission; Ordžonikidze elected full member |
| 4 Feb 1932 |
Rudzutak relieved of duties at the Central Committee plenum; Andreev elected full member |
| 10 Feb 1934 |
Politburo elected by the Central Committee: full members - Andreev, Vorošilov, Kaganovič, Kalinin, Kirov, Kosior, Kujbyšev, Molotov, Ordžonikidze, Stalin; candidate members - Mikojan, Petrovskij, Postyšev, Rudzutak, Čubar |
| 1 Dec 1934 |
Kirov assassinated |
| 25 Jan 1935 |
Kujbyšev died |
| 1 Feb 1935 |
Mikojan and Čubar elected full members at the Central Committee plenum, Ždanov and Èjhe elected candidate members |
| 18 Feb 1937 |
Ordžonikidze committed suicide |
| 26 May 1937 |
Rudzutak expelled from the Central Committee and party by questionnaire (arrested 25 May 1937) |
| 12 Oct 1937 |
Ežov elected candidate member at the Central Committee plenum |
| 14 Jan 1938 |
Postyšev relieved of duties at the Central Committee plenum; Hruščëv elected candidate member |
| 29 Apr 1938 |
Èjhe arrested (executed 4 Feb 1940) |
| 3 May 1938 |
Kosior arrested (executed 26 Feb 1939) |
| 16 Jun 1938 |
Čubar relieved of duties by resolution of the Politburo |
| 22 Mar 1939 |
Politburo elected by the Central Committee: full members - Andreev, Vorošilov, Ždanov, Kaganovič, Kalinin, Mikojan, Molotov, Stalin, Hruščëv; candidate members - Berija, Švernik |
| 21 Feb 1941 |
Voznesenskij, Malenkov and Ščerbakov elected candidate members at the Central Committee plenum |
| 10 May 1945 |
Ščerbakov died |
| 18 Mar 1946 |
Berija and Malenkov elected full members, Bulganin and Kosygin candidate members at the Central Committee plenum |
| 3 Jun 1946 |
Kalinin died |
| 26 Feb 1947 |
Voznesenskij elected full member at the Central Committee plenum |
| 18 Feb 1948 |
Bulganin approved full member by questionnaire |
| 31 Aug 1948 |
Ždanov died |
| 4 Sep 1948 |
Kosygin approved full member by questionnaire |
| 7 Mar 1949 |
Voznesenskij relieved of duties by questionnaire |
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