The fortress was built in the XIV century On the orders of king Haakon V as the first powerful citadel of brick and stone, defending the Norwegian capital.

Under king Christian IV in 1624, the castle was rebuilt and got a new look in the Renaissance style with luxurious rooms and dark caves used since 1811 as a prison.

During the Second world war, was captured by Nazi troops of the fortress housed the German Gestapo. At castle square June 1, 1989 for the first time in world history the head of the Roman Catholic Church, John Paul II celebrated a solemn mass during his visit to Norway. In the chapel of the castle buried Royal Norwegian monarchy, among them Sigurd I and Haakon V.

At the present time, the castle has retained its military and national importance. On its territory there are the Ministry of defence and the Headquarters of the Norwegian armed forces, Norwegian defence Museum and the Museum of the popular front, arranged receptions of national importance. Standing on the ancient walls of the castle, you can admire a magnificent panorama of Oslo, Aker Brugge and the Bay.

Akershus fortress is open daily for tourists and everyone.