The Rise of Regional Centers
Kievan Rus' was not able to maintain its position as a powerful and prosperous state, in part because of the amalgamation of disparate lands under the control of a ruling clan. As the members of that clan became more numerous, they identified themselves with regional interests rather than with the larger patrimony. Thus, the princes fought among themselves, frequently forming alliances with outside groups such as the Polovtsians, Poles, and Hungarians. The Crusades brought a shift in European trade routes that accelerated the decline of Kievan Rus'. In 1204 the forces of the Fourth Crusade sacked Constantinople, making the Dnepr trade route marginal. As it declined, Kievan Rus' splintered into many principalities and several large regional centers. The inhabitants of those regional centers then evolved into three nationalities: Ukrainians in the southeast and southwest, Belorussians in the northwest, and Russians in the north and northeast.
In the north, the Republic of Novgorod prospered as part of Kievan Rus' because it controlled trade routes from the Volga River to the Baltic Sea. As Kievan Rus' declined, Novgorod became more independent. A local oligarchy ruled Novgorod; major government decisions were made by a town assembly, which also elected a prince as the city's military leader. In the twelfth century, Novgorod acquired its own archbishop, a sign of increased importance and political independence. In its political structure and mercantile activities, Novgorod resembled the north European towns of the Hanseatic League, the prosperous alliance that dominated the commercial activity of the Baltic region between the thirteenth and seventeenth centuries, more than the other principalities of Kievan Rus'.
In the northeast, East Slavs colonized the territory that eventually became Muscovy by intermingling with the Finno-Ugric tribes already occupying the area. The city of Rostov was the oldest center of the northeast, but it was supplanted first by Suzdal' and then by the city of Vladimir. By the twelfth century, the combined principality of Vladimir-Suzdal' had become a major power in Kievan Rus'.
In 1169 Prince Andrey Bogolyubskiy of Vladimir-Suzdal' dealt a severe blow to the waning power of Kievan Rus' when his armies sacked the city of Kiev. Prince Andrey then installed his younger brother to rule in Kiev and continued to rule his realm from Suzdal'. Thus, political power shifted to the northeast, away from Kiev, in the second half of the twelfth century. In 1299, in the wake of the Mongol invasion, the metropolitan of the Orthodox Church moved to the city of Vladimir, and Vladimir-Suzdal' replaced Kievan Rus' as the religious center.
To the southwest, the principality of Galicia-Volhynia had highly developed trade relations with its Polish, Hungarian, and Lithuanian neighbors and emerged as another successor to Kievan Rus'. In the early thirteenth century, Prince Roman Mstislavich united the two previously separate principalities, conquered Kiev, and assumed the title of grand duke of Kievan Rus'. His son, Prince Daniil (Danylo; r. 1238-64) was the first ruler of Kievan Rus' to accept a crown from the Roman papacy, apparently doing so without breaking with Orthodoxy. Early in the fourteenth century, the patriarch of the Orthodox Church in Constantinople granted the rulers of Galicia-Volhynia a metropolitan to compensate for the move of the Kievan metropolitan to Vladimir.
However, a long and unsuccessful struggle against the Mongols combined with internal opposition to the prince and foreign intervention to weaken Galicia-Volhynia. With the end of the Mstislavich Dynasty in the mid-fourteenth century, Galicia-Volhynia ceased to exist; Lithuania took Volhynia, and Poland annexed Galicia.