Kievan Rus'
Kievan Rus', also known as Kyivan Rus', was the first East Slavic state and, later, an amalgam of principalities, in Eastern Europe from the late 9th to the mid-13th century. Encompassing a variety of polities and peoples, including East Slavic, Norse, and Finnic, it was ruled by the Rurik dynasty, founded by the Varangian prince Rurik.