Нерчинский договор
During the 17th century, the Tsardom of Russia was expanding east across Siberia, and into Tungusic-speaking lands, ending with the 1689 Treaty of Nerchinsk. The first published description of a Tungusic people to reach beyond Russia into the rest of Europe was by the Dutch traveler Isaac Massa in 1612. He passed along information from Russian reports after his stay in Moscow.