The Lapland dispute and the argumentation of Ivan IV Vasilievich in the border dispute between Russia and Denmark-Norway (on the example of the tsar's letter to the king of Denmark of July 1582)

The article is devoted to study of the issues connected with intensification of the Lapland dispute in the second half of the 16th century, as well as to examination of arguments of Tsar Ivan’s IV the Terrible in the border dispute with Frederic II king of Denmark-Norway. The author tries to find the examples of mutual influence between the Lapland dispute and the Estonian issue which was discussed by Russia and Denmark in connection with the Livonian War.