The work of A. Andreev is a documentary biography of Ivan Vasilyevich III. The work publishes the treaty letters of Ivan Vasilyevich, the Moscow and Novgorod stories about Ivan Vasilyevich’s campaign against Novgorod, the Korostyn Treaty of Veliky Novgorod with Grand Duke Ivan Vasilyevich about the peace of 1471, the Message to the Ugra Vassian Rylo, The Tale of Standing on the Ugra, Code of Laws of 1497, as well as the spiritual letter of Ivan Vasilyevich, many other original documents of that time - from the “Tarkhannaya and unconvicted letter of Grand Duke Ivan Vasilyevich to Fyodor Kiselyov on his estate in the Murom district” to the “Oath record” Prince Kholmsky to Ivan Vasilyevich."