"Big Soviet Encyclopedia" is the largest Ukrainian-language encyclopedia in the world at the beginning of the 21st century and one of the most authoritative general encyclopedias, which covers various fields of knowledge: from natural sciences to art and culture. Published by the "Great Soviet Encyclopedia" publishing house in the period from 1926 to 1990. The book consists of about 100 volumes and contains more than 200,000 articles, illustrations and tables. "Great Soviet Encyclopedia" is a real treasure for everyone who wants to get acquainted with deep knowledge and diversity of the world.