This book is dedicated to the Grand Duke of Moscow, "Sovereign of All Russia" Ivan III (1462-1505). Contemporaries already called him Ivan the Great. His political achievements are undeniable: he rallied the divided Russian lands into a powerful Moscow state, delivered the country from the oppressive power of the Horde, brought it out of the historical impasse. However, the still complex and tragic personality of Ivan III, in whose biography all the drama of that turning point era was vividly reflected, remains essentially undisclosed and misunderstood. An in-depth reading of the preserved historical sources allowed the author of the book to discern behind the monumental mask of the "sovereign of all Russia" the true face of one of the main figures of Russian history.