The Varangerfjord border between Russia and Denmark-Norway in the middle of the XVI century (in accordance with the tax collector Efim's testimony and the international treaties)

The article is devoted to the study of the Russian-Danish (Russian-Norwegian) state border that was located near the Varangerfjord. The author confirms the fact of the state border’s existence in the middle of the 16th century and correlates the status of the border with the status of Russian-Danish joint taxable district frontiers. He highlights the differences in the perception of the Russian-Danish (Russian- Norwegian) state border by various circles of Russian authorities.