sentences:  Karelian Fortified Region
  
  The 22nd Karelian Fortified Region (KaUR; ) is a 60 km wide Soviet defensive fortified district to the north of Leningrad (now Saint Petersburg) that was built in 1928–1932, 1938–1939, 1941-1944 and 1950–1965 in the Soviet part of the Karelian Isthmus amongst other fortified areas (including the Stalin Line) constructed around that time in order to defend the western borders of the Soviet Union.KaUR spans the old Finno-Russian border from Valkeasaari near the northern shore of the Gulf of Finland through Lempaala to Nizhniye Nikulyasy Bay on the western shore of Lake Ladoga.