In 1721, after the Great Northern War, it was restitutioned to Russia by the Treaty of Nystad.
In the 18th century, the Ladoga Canal was built to bypass the lake which was prone to winds and storms that destroyed hundreds of cargo ships. Later, from around 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.
The situation gradually recovered, and in 1971–1990 the catch ranged between 4,900 and 6,900 tonnes per year, about the same level as the total catch in 1938.
In the early 14th century, the fortresses of Korela (Kexholm) and Oreshek (Nöteborg) were established along the banks of the lake. The ancient Valaam Monastery was founded on the island of Valaam, the largest in Lake Ladoga, abandoned between 1611–1715, magnificently restored in the 18th century, and evacuated to Finland during the Winter War in 1940.
/ April 1996. Ladoga Lake (photos) War on Lake Ladoga, 1941–1944 Maps Ladoga LLadoga Karelian Isthmus Ladoga Mesoproterozoic rifts and grabens Ladoga
After the war, between 1945–1954, the total annual catch increased and reached a maximum of 4,900 tonnes.
However, unbalanced fishery led to the drastic decrease of catch in 1955–1963, sometimes to 1,600 tonnes per year.
Trawling has been forbidden in Lake Ladoga since 1956 and some other restrictions were imposed.
The situation gradually recovered, and in 1971–1990 the catch ranged between 4,900 and 6,900 tonnes per year, about the same level as the total catch in 1938.
In 1989 the monastic activities in the Valaam were resumed.
/ April 1996. Ladoga Lake (photos) War on Lake Ladoga, 1941–1944 Maps Ladoga LLadoga Karelian Isthmus Ladoga Mesoproterozoic rifts and grabens Ladoga
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