Shlisselburg is a town in Leningrad Oblast, Russia, situated at the head of the Neva River on Lake Ladoga, east of St. Petersburg. From 1944 to 1992, it was known as Petrokrepost. Population: The fortress and the city center are UNESCO World Heritage Sites. The fortress Built originally as a wooden fortress named Oreshek (also Orekhov) ("Nutlet") by Grand Prince Yury of Moscow (in his capacity as Prince of Novgorod) on behalf of the Novgorod Republic in 1323, it guarded the northern approaches… (More on Oreshek)