The "Great Soviet Encyclopedia" is a huge reference book of general content, which was published in the Soviet Union in the period from 1926 to 1990. In its 31 volumes, it contained information on various aspects of life at that time: from science and technology to culture, history and politics. Each volume of the encyclopedia was impressive with the volume and depth of knowledge presented in it. The Great Soviet Encyclopedia has been an important source of information for millions of readers and is an important testament to the country's history and heritage.