"Basmo fortress is located in the north-western part of Marker municipality in \u00D8stfold near the Swedish border on an isolated mountain outcropping between R\u00F8denessj\u00F8en and Hemnessj\u00F8en.It was constructed in the 1680s and was abandoned after 62 years of service in 1745. The first mention of this Norwegian fortress is in a letter from Field Marshal Wedel Jarlsberg to the King in 1683. Major General Johan Caspar von Cicignon developed the plans."@en . "1680s" . "Basmo festning"@en . .