|Mordovian Autonomous Soviet Socialist Republic|
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|Autonomous Republic of Soviet Union|
|December 20 1934|
|December 7 1990|
The Mordovian Autonomous Soviet Socialist Republic (Russian: ? ? ? ?, Mordovskaya Avtonomnaya Sovetskaya Sotsialisticheskaya Respublika; Erzya: ? ? ? , Mordovskjaj Avtonomnaj Sovetskjaj Socialisti?eskjaj Respublika?; Moksha: ? ? ? , Mordovskoj Avtonomnoj Sovetskoj Socialisti?eskoj Respublika?) was an autonomous republic of the Russian SFSR within Soviet Union now known as the Republic of Mordovia.
The Mordovian Autonomous Soviet Socialist Republic was established on December 20, 1934 after the transformation of Mordovian Autonomous Oblast in Kuybyshev Krai. After Kuybyshev Krai was itself transformed into Kuybyshev Oblast, the Mordovian ASSR was separated from it and subordinated directly to the Russian Soviet Federative Socialist Republic.
On December 7, 1990, the Mordovian ASSR adopted the Declaration on the legal status of the Republic of Mordovia, which changed the status of the republic from ASSR to an SSR. In 1990, shortly before the dissolution of the Soviet Union, the republic became the Republic of Mordovia. In its present form, the republic has existed since January 25, 1994.