The reign of Grand Duke Yaroslav Vladimirovich (1019-1054) is rightly called the "golden age" of Kievan Rus. Almost the only ruler of Russia, he was lucky to go down in history with the nickname "Wise" - perhaps the most flattering and most honorable for any state husband. Meanwhile, the biography of Yaroslav the Wise has not yet been written. The book offered to the attention of readers is the first full-fledged biography of this wonderful person, based on a scrupulous study of all surviving sources. The second edition of the book is significantly improved by the author.