The belt consists of multiple small memorials marking the historical front line.
The concept originated from poet Mikhail Dudin, and was approved by the Leningrad and Regional Councils.
Lead-up work took place from 1958 to 1964, with the construction beginning in 1965 on the eve of the 20th victory celebrations.
The symbolic heart of the belt is in the Monument to the Heroic Defenders of Leningrad in Victory Square.
The belt remains a gathering point for ceremonies commemorating the war and the siege.