The camp at Hovedøya was the largest of its kind with inmates from all over the country. However, there were many similar camps across Norway. The other main tyskertøs camp for the Oslo area was Hovelåsen outside Kongsvinger , which held 450 detainees.
: https://en.wikipedia.org/wiki/National_Internment_Camp_for_Women_in_Hoved%C3%B8ya