"Big Soviet Encyclopedia" (PN) is a large popular science encyclopedia published in the Soviet Union. At the time, it was one of the largest publications of this format and contained a huge amount of information from various fields of knowledge. The encyclopedia covers history, culture, science, technology, geography and many other aspects of the life of various nations and peoples. Each concept is explained in detail and illustrated with appropriate drawings or photographs. "Great Soviet Encyclopedia" (PN) is not only a source of knowledge, but also a huge treasury of cultural heritage.