From the author:" In the simplest and clearest form, the Soviet interpretation of the history of the Middle Ages, as it was developed around 1950, is given in the third edition of the textbook of Academician E.A. Kosminsky for high school. This book, according to the author, was supposed to be a complete Stalinist type of educational manual for a mass school in its Zhdanov edition." The work of Yu. Valensky presents the results of a critical analysis of this textbook (Kosminsky E.A. History of the Middle Ages: A textbook for the 6th - 7th grades of a secondary school. Ed. 3rd. - M.: Uchpedgiz, 1951).