After the war, on September 4, 1950, the BSSR Consul of Ministers committee for cultural and educative institutions adopted the Decree “On the improvement of the BSSR V.I. Lenin State Library operation”. The Decree defined the Library tasks: interlibrary loan support; scientific, methodological, and bibliographic work; library and bibliographic service. The Library became the BSSR central state book depository.

From year to year the Library extended its activities and duties and developed its information resources and research work. The Library had an influence on Belarusian society and economy, science, and culture. As usual, the main task of the Library was the development of a universal collection, and first of all collection of Belarusian national book heritage. Besides the whole collection of publications issued in the USSR the Library disposed of a collection of foreign scientific materials. In 1956 the Library became one of the UN deposit libraries.

The Library main building

The Library was the BSSR biggest bibliographic centre. The Library performed the registration of Belarusian national press and issued “Chronicles of Belarusian Press” until 1977 when the Book Chamber was separated from the Library. A particular attention was paid to the development of recommendatory bibliography. The Library reference and bibliographic department was re-organized into scientific and bibliographic department performing the duties of a recommendatory bibliography centre. In 1962 the Republican conference of librarians on monitoring of the BSSR bibliographic activities adopted a statute which defined the Library as a republican and methodological centre of bibliography and humanities. The Library started issuing bibliographies: recommendatory bulletin “New Books”, reference books “Social Studies”, “New literature on the History”, “New Literature on Culture and Art”, “Automated Library Systems”, and others. Besides that, the Library issued fundamental scientific and methodological reference books: “Books of Belarus, 1517–1917. Union Catalogue” (1986); “Soviet Belarus Fiction, 1917–1960” (1962); “Belarusian Soviet Dramatic Art, 1917–1965” (1967); “Belarusian History Bibliography: Feudalism and Capitalism” (1969); “Books in Russian Language Concerning Belarus Issued before the October Revolution, 1768–1917” (1976); “The BSSR Musical Literature” (1976, 1977); “The BSSR during the Great Patriotic War 1941–1945” (1980, 1990), and others.

The oldest librarians

In 1976 the Library became the Belarusian republican centre of culture and art. In the Library was organized culture and art scientific department. The State Library headed the BSSR information centers system which was organized in 1977 in Belarusian district libraries. The Library started issuing publications on culture: “Chronicles of the BSSR Cultural Life”, “Information on the Issues of Culture and Art”, and a full text collection of the BSSR Ministry of Culture documents

The State Library was coordinating Belarusian libraries activities: development of library collections and user service. In 1974 the Library became a coordinating centre on the BSR libraries centralization. Coordination of the BSSR libraries, implementation of innovations, improving user service, and development of library education favored Belarusian library science. The Library studied user interests and needs, cooperated with publishing houses and developed the BSSR book-publishing. Thanks to these activities Belarusian libraries were considered to be the best libraries of the USSR.

In 1974 in the Library was organized library science department. The Library became the main Belarusian centre of library science. The Library coordinated research work of the biggest Belarusian libraries and Minsk pedagogical Institute Library department.

The first graduates of the library department (1947)

The State Library initiated the higher library education in the BSSR. As early as in 1923 Joseph Simanovsky developed a plan of library courses organizing, but the BSSR People’s Commissariat of Education didn’t approve this suggestion. This idea was realized only in the 1930^th. In 1934 in the Library were organized the two-year higher library courses (existed until 1936) and post-graduate study (existed until 1937). After the World War II in Minsk Pedagogical Institute was organized the library department headed by Joseph Simanovsky.

In 1972 the State Library of Belarus celebrated its 50th anniversary. On this occasion the Library was awarded with the Order of the Red Banner of Labor, the USSR highest prize.

Due to the growth of the Library collections and the number of users the Library needed free spaces. In 1958-1962 in Kirova Street were built additional premises where was located a book depository. But in 15 years it was filled up. The library had to keep its book collections in different premises in Minsk and Minsk district. The Library obviously needed a new building.

Handing of the Red Banner of Labor (1972)

In 1989 the BSSR Council of Ministers organized a contest of the best architectural project of the Library new building. The project by architects M.K. Vinogrdov and V.V. Kramarenko won the contest. The architects developed an original composition which is named today as “The Belarusian Diamond”. The building should have been started in the early 1990s, but this project was realized only in ten years.