 In 1485, the area was included to the Grand Duchy of Moscow.In the course of the administrative reform carried out in 1708 by Peter the Great, the area was included into Ingermanlandia Governorate (since 1710 known as Saint Petersburg Governorate), and in 1727 Novgorod Governorate split off.In 1775, Tver Viceroyalty was formed from the lands which previously belonged to Moscow and Novgorod Governorates, and the area was transferred to Tver Viceroyalty, which in 1796 was transformed to Tver Governorate.