 The Neva drains into the Baltic Sea, and the Volga drains into the Caspian Sea.Thus, the divide between the Atlantic Ocean and the Caspian Sea runs through the district.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.