"Great Soviet Encyclopedia" is one of the largest publications in the history of world encyclopedia. It was published in 1926 and became widely known due to its volume, depth and relevance of information. In those days, the encyclopedia was considered not only a source of knowledge, but also an ideological guide. The authors worked on it under the guidance of outstanding scientists. Each volume contained thousands of articles on a wide variety of topics: from the natural sciences to history and culture. "Bolshaya Sovetskaya Encyclopedia" became a real treasury of knowledge for generations of Soviet citizens, opening up to them the worldwide experience and cultural heritage of humanity.