Trondheim end of the war, around 80 Jews returned to the city. Out of the 135 individuals sent to Auschwitz, only five remained in Norway. It is unclear how many others, if any, survived. The synagogue was repaired in 1947. In May 1997, a Jewish museum was opened in Trondheim. At the turn of the 21st century, 120 Jews were living in Trondheim. Trondheim is situated where the River Nidelva meets Trondheim Fjord with an excellent harbour and sheltered condition. The river used to be deep enough for most boats in the Middle Ages. An avalanche of mud and stones made
Trondheim city and its citizens were also subject to harsh treatment by the occupying powers, including imposition of martial law in October 1942. During this time the Germans turned the city and its environs into a major base for submarines (which included building the large submarine base and bunker DORA I), and also contemplated a scheme to build a new city for 300,000 inhabitants, "Nordstern" ("Northern Star"), centred southwest of Trondheim, near the wetlands of Øysand in the outskirts of Melhus municipality. This new metropolis was to be accompanied by a massively expanded version of the already existing naval base, which