Lake Ladoga Stolbovo, the northern and western coast was ceded by Russia to Sweden. In 1721, after the Great Northern War, it was restitution to Russia by the Treaty of Nystad. Later, in 1812–1940 the lake was shared between Finland and Russia. According to the conditions of the 1920 Tartu Peace Treaty militarization of the lake was severely restricted. However, both Soviet Russia and Finland had flotillas in Ladoga (see also Finnish Ladoga Naval Detachment). After the Winter War (1939–40) according to the Moscow Peace Treaty, Ladoga, previously shared with Finland, became an internal basin of the Soviet Union. During the Continuation
Novaya Ladoga Volkhov and the Neva. It replaced the Old Ladoga Canal, built by Peter the Great, which thus became disused and decayed. The canals collectively are known as the Ladoga Canal. The district contains seven cultural heritage monuments of federal significance and additionally five objects classified as cultural and historical heritage of local significance. The federal monuments are the trading arcades, the Nikolo-Medvedsky Monastery, the monument erected to commemorate the opening of the Ladoga Canal, as well as two buildings related to the activities of Alexander Suvorov, who was a regiment commander in Novaya Ladoga, and the building hosted the headquarters