Before revision: Kievan Rus' and successor states (; literally, great prince) was, starting in the 10th century, the title of the leading Prince of the Kievan Rus' , head of the Rurikid House: first the prince of Kiev, and then that of Vladimir and Galicia-Volhynia starting in the 13th century.
After revision: Kievan Rus' and successor states Kievan Rus' century, the monarchs of other Rus' principalities which originated as appanages of Kiev, such as Vladimir-Suzdal andLater Rus' principalites In the 13th Galicia-Volhynia starting in the 13th century.