King Hkon V ordered the construction of the mediaeval fortress Akershus Fortress (Akershus Festning) in 1299. King Christian IV later transformed it into a Renaissance royal home at the beginning of the 17th century.

The grounds offer breathtaking views of the harbour and are perched on a point overlooking the Oslofjord. In addition to the Museum of Norwegian Resistance (Norges Hjemmefrontmuseum), which is situated on the castle grounds, guided excursions are offered throughout the summer.

The Norwegian Armed Forces Museum can be of interest to history buffs as well (Forsvarsmuseet). This excellent museum showcases artifacts and weapons that depict Norway’s military history. Additionally, the fortress’s grounds make a wonderful backdrop for public ceremonies, concerts, and performances.

Learning about Oslo’s past may be done very well at Akershus Fortress. The late 13th-century fortress was constructed to protect Oslo from attackers, which it accomplished. Later, Norse kings had it updated and transformed into a Renaissance fortress and royal home. It is situated in a key location on the Oslofjord headland. Even though it is no longer a royal house, it is nevertheless frequently utilized for events like concerts and holidays.

Although Akershus Fortress is still a military installation, it is open to visitors daily until 21.00. The Norwegian Resistance Museum and the Norwegian Armed Forces Museum are situated in addition to the castle. In the eastern portion of Akershus Fortress, the modern headquarters of the Norwegian Ministry of Defense and Defense Staff Norway are also located.