Russkaya Pravda
Historians tend to view Konstantin as a leader of an anti-Varangian party in Novgorod. His conflict with the Varangians is sometimes given as a reason for the promulgation of the earliest part of the Russkaya Pravda. On the other hand, the chronicle's information about his career may have been biased, if Konstantin indeed was the ancestor of the chronicle's co-author, Yan Vyshatich, as many historians speculate.