Hanstholm fortress (German: Festung Hanstholm, Danish: Hanstholm batteri) was a large coastal fortification, which the Germans constructed at Hanstholm in north-western Denmark during World War II. The fortress was part of the "Atlantic Wall" and its main purpose was to seal off the entrance to Skagerrak together with the Vara fortress in Kristiansand, southern Norway, as well as with the extensive minefields in Skagerrak. The fortress had a wide range of artillery, ranging from medium-sized 17 cm guns up to four massive 38 cm S.K.C/34 guns, weighing 110 tonnes each (the whole gun position weighing 650 tonnes). The guns were protected by 3.5 m of reinforced concrete and many anti-aircraft guns. The 38 cm guns were similar to the ones fitted to the Bismarck-class battleships and had been in