On January 31, 1667, the Truce of Andrusovo was concluded, in which the Polish–Lithuanian Commonwealth ceded Smolensk, Severia and Chernigov, and, on paper only for a period of two years, the city of Kiev to the Tsardom of Russia. The Eternal Peace of 1686 acknowledged the status quo and put the city under the control of Russia for the centuries to come. Kiev slowly lost its autonomy, which was finally abolished in 1775 by the Empress Catherine the Great. None of the Polish-Russian treaties concerning the city have ever been ratified.