"Big Soviet Encyclopedia" is one of the most comprehensive and authoritative encyclopedias published in the Soviet Union. It was first published in 1926, and later went through several editions, the last of which was published in 1976. The encyclopedia contained a wide range of information from various fields of knowledge: from history, geography and natural sciences to literature, art and technology. The "Great Soviet Encyclopedia" was distinguished not only by its volume, but also by a high level of authority and a scientific approach to information processing. The publication contained many illustrations, diagrams, tables, which helped to better understand the presented data. This encyclopedia is undoubtedly an important document of history and culture and is an integral part of the Soviet era. Its importance lies not only in the information itself, but also in the evidence of the worldview and spirit of those times.