Kievan Rus' principality

Timeline

1. 882–912Kiev · UkraineOleg, prince of Novgorod, marched south to conquer Kiev and set the capital on the middle Dnieper, integrating the East Slavic tribes and laying the political framework of Kievan Rus' along with control of the north–south trade route.
2. 1021–1030Kiev · UkraineDuring the reign of Grand Prince Yaroslav in the early 11th century, the territory and church organization of Kievan Rus' reached their zenith; the legal code Russkaya Pravda was compiled, and marriage and diplomatic ties were established with European kingdoms.
3. 988–1100Saint Sophia Cathedral, Kiev · UkraineAfter his baptism, Vladimir the Great made Orthodox Christianity the state religion; structures such as Saint Sophia Cathedral were built in Kiev, and Slavic written culture and Church Slavonic literature spread throughout the principality.
4. 1132–1240The Rus' principalities · RussiaAfter Monomakh's death, the authority of the Grand Prince of Kiev declined and feudal division among the principalities intensified; in 1240 Mongol forces captured Kiev, and Kievan Rus' ceased to exist as a unified political entity in both name and substance.