Law in Medieval Russia

Much of what we know about the colourful Russian middle ages comes from legal sources: the treaties of Russian-Scandinavian warlords with the Byzantine emperors, the gradual penetration of Christianity and Byzantine institutions, the endless game of war and peace among the numerous regional princes, the activities of Hanseatic merchants in the wealthy city-republic of Novgorod, the curious relationships between the Mongol conquerors and Russian rulers and church dignitaries, etc. And, at the eve