Principality of Tverball

Principality of Tverball was a Russian principality or duchy, which existed between the 13th and the 15th centuries. It was one of the states established after the decay of the Kievan Rusballand in the 13th century Tverball rivaled the Principality of Moscowball and aimed to become the center of the united Russian state. Eventually it lost, decayed, and in 1485 was annexed by the Grand Duchy of Moscowball. The principality was located approximately in the area currently occupied by Tver Oblast and the eastern part of Smolenskball Oblast of Russiaball. The capital of the principality was Tverball.