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She was invaded in 1223 by the Tatars and Mongols.
Kievan Rus' ended in 1240.
Kievan Rus' was created in 880.
He was a King!
He was a King!
The Kievan Rus' became more isolated from European civilization.
The Kievan Rus' became more isolated from European civilization.
It is really a two part answer. Because of the destruction of Kiev and Kievan Rus by the Golden Horde (the Mongols), the Metropolitan (head of the Orthodox Church for Kiev) feared for his life and the survival of the church and moved to Vladimir-Susdal (nearer to Moscow) away from the Mongols reach. Moscow, a relatively small city at the time, grew quickly when it's leader arranged to collect the payment to the Mongols for not only his city but other cities in the region. Thus gaining him and Moscow stature and favor in the eyes of the Mongols.
The Rus' were a group of vikings originating from Sweden that eventually settled in Northeastern Europe (Russia today). They established Kievan Rus, a medieval polity in what is now the Ukraine.
Kievan Rus
Oleg
Eastern