Vladimir the Great Yaroslav the Wise Golden Age the acceptance of Byzantium legal code Russkaya Pravda feudalism Rurik dynasty Vladimir-Suzdal Novgorod Republic Galicia-Volhynia Andrey Bogolyubsky Vladimir Kievan Rus' Novgorod Kiev East Slavic Rurik Orthodox Christianity Suzdal
In the 10th to 11th centuries, Kievan Rus' became one of the largest and most prosperous states in Europe. The reigns of Vladimir the Great (980–1015) and his son Yaroslav the Wise (1019–1054) constitute the Golden Age of Kiev, which saw the acceptance of Orthodox Christianity from Byzantium, and the creation of the first East Slavic written legal code, the Russkaya Pravda. The age of feudalism and decentralisation had come, marked by constant in-fighting between members of the Rurik dynasty that ruled Kievan Rus' collectively. Kiev's dominance waned, to the benefit of Vladimir-Suzdal in the north-east, the Novgorod Republic in the north, and Galicia-Volhynia in the south-west. By the 12th century, Kiev lost its pre-eminence and Kievan Rus' had fragmented into different principalities. Prince Andrey Bogolyubsky sacked Kiev in 1169 and made Vladimir his base, leading to political power being shifted to the north-east.
