 In 1617, according to the Treaty of Stolbovo, the area was transferred to Sweden, and in the 1700s, during the Great Northern War, it was conquered back by Russia.The city of Saint Petersburg was founded in 1703.In the course of the administrative reform carried out in 1708 by Peter the Great, the area was included into Ingermanland Governorate (known since 1710 as Saint Petersburg Governorate).