"Big Soviet Encyclopedia" is a publication that was first published in 1926 and became one of the largest and most authoritative sources of knowledge in the Soviet Union. The encyclopedia consists of 65 volumes and contains information from various fields of knowledge: from history and art to science and technology. Each volume of the encyclopedia is filled with illustrations, diagrams and maps that help readers better understand the material. "Big Soviet Encyclopedia" became an invaluable source of information for many generations of Soviet citizens and researchers.