The 28th Congress of the CPSU (July 2, 1990 – July 13, 1990) was held in Moscow. It was held a year ahead of the traditional schedule and turned out to be the last Congress of the Communist Party of the Soviet Union (CPSU) in the history of the party. Notably, this congress displayed open factionalism: opposing views were championed by the centrist "CPSU Central Committee platform" (supported by Gorbachev), the liberal "Democratic Platform" (which included Boris Yeltsin) and the conservative "Marxist Platform".
Various organizations claiming to be the successor of the CPSU have held congresses continuing the numbering established by the CPSU and its predecessors. The Communist Party of the Soviet Union (1992) held its so-called 29th Restorative CPSU Congress in 1992 declaring the CPSU reinstated. Similarly, the Union of Communist Parties — Communist Party of the Soviet Union, established in 1993, has also held congresses starting from 29th, the most recent being the 33rd Congress.
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