On June 21 (July 1), 1661 at Kyard’ grange (Cardis in Russian tradition), near Dorpt (Tartu) as a result of Russo-Swedish war of 1656-1658, the two countries signed the Treaty of Cardis on ‘the eternal peace’.
The history of the Russian State Library begins with a collection of books, manuscripts, paintings and maps that belonged to the diplomat, chancellor, chairman of the State Council Nikolai Petrovich Rumyantsev (1754–1826). After the death of the count, the collection formed the basis of the Rumyantsev Museum in St. Petersburg, established by personal decree of Emperor Nicholas I on March 22 (April 3), 1828.