"Big Soviet Encyclopedia" is one of the largest and most authoritative publications, which was published in Soviet times from 1926 to 1990. Its volume is about 65 volumes, which contain a huge amount of information from various scientific fields, history, culture, technology, art, geography and much more. Each volume of the "Great Soviet Encyclopedia" is a real treasure trove of knowledge, containing thousands of articles, illustrations, maps and tables. Its editorial staff consisted of scientists, specialists and scientists from all over the Soviet Union, which guaranteed high quality and reliability of information. "Big Soviet Encyclopedia" became a real symbol of its time and for many years served as a source of knowledge for millions of readers. It is an important historical document that reflects the cultural and scientific achievements of Soviet society and is an integral part of cultural heritage.