On 27 May 1920 the Tatar Autonomous Soviet Socialist Republic (TASSR) of the RSFSR was declared. However, in the late 1920s the Soviet government under Joseph Stalin began to place restrictions on the use of the Tatar language (among many other minority languages in the Soviet Union). The development of national culture declined significantly. The Tatar alphabet was switched twice (to the Latin alphabet and then to Cyrillic). From the 1930s through the 1950s, Tatar-language press, cultural institutions, theatres, national schools and institutes gradually disappeared, as education was required to be conducted in the Russian language. Industrialization, the rise of the collective farms kolektivizatsiya and persecutions such as the Great Purge contributed to this decline.