The Great Soviet Encyclopedia (GSE) is one of the largest Russian-language encyclopedias, published by the Soviet Union from 1926 to 1990. After 2002, the encyclopedia's data was partially included into the later Bolshaya Rossiyskaya entsiklopediya (or Great Russian Encyclopedia) in an updated and revised form. The GSE claimed to be "the first Marxist–Leninist general-purpose encyclopedia".