Karljohansvern
Today Karljohansvern in Horten is a well-established, vibrant cultural centre which can be enjoyed by anyone wishing to visit it. In 1818, King Karl Johan decided that a new central Naval establishment should be built at Horten, with a naval shipyard and naval base. The Norwegian Navy and Armed Forces have developed over 200 years with pioneering technology, including steamships, ammunition, torpedoes and subsequently seaplanes. Karljohansvern has great military- and national historical importance. The Norwegian Armed Forces are still located at Karljohansvern and represented by a Commandant. The site is managed by the Norwegian Defence Estates Agency and Karljohansvern has become an important local centre for culture, businesses and experiences. The Fortress Manager is responsible for development work in conjunction with local cultural and business organisations and other joint venture partners.
A Maritime Community and Technological Pioneer
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The Museums at Karljohansvern
The historic military buildings at Karljohansvern today house several museums—well worth a visit. The Naval Museum features fascinating collections related to the history of the Royal Norwegian Navy, in times of both war and peace. The Preus Museum offers exhibitions in photography and visual art. The Local History Centre presents displays on everyday life in the recent past. In addition, several naval vessels are open to the public, along with a visitor centre dedicated to inspiring a cleaner Oslofjord.
Events at the Fortress
The History of the Fortress
Karljohansvern was established in 1818 as the main base for the Royal Norwegian Navy, and for over 150 years it was one of Norway’s most important centers of military strategy and technological advancement. During a time of rapid industrialization, the naval yard in Horten became a hub for shipbuilding and innovation. Norway’s first technical school was founded here, and the yard quickly became the lifeblood of the town.
Throughout the 19th and 20th centuries, Karljohansvern led the way in the development of steam engines, naval vessels, submarines, and later, aircraft. At the same time, a complete community grew up around the base, with housing, schools, and a vibrant environment for both military and civilian life. Many of the original buildings still remain, offering a vivid picture of how the Navy organized both work and daily living.
Although the Navy’s main base has since relocated, the Armed Forces continue to operate at Karljohansvern. Today, the area has evolved into a diverse arena for culture, enterprise, and recreation. The legacy of technological innovation lives on through local industries and educational institutions that have taken root in the region.
Practical information
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The fortress grounds at Karljohansvern are open 24 hours a day.
Museums, cafés, exhibitions, and shops have their own opening hours, which may vary.
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Admission to the fortress area is free of charge. Museums, concerts, events, festivals, and similar activities require separate tickets and pricing.
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Karljohansvern is a large area that stretches over more than two kilometers.
The Cultural Wharf, with museums and cultural workshops, has its main entrance at Kommandørkaptein Klincks vei.
Conduct at the Fortress
- Dogs must be kept on a leash at all times throughout the entire area.
- Please dispose of waste in the bins provided.
- Drone use is prohibited at Møringa, the islands, and the industrial area.
- Digging or searching with metal detectors is not permitted.
- Be a good neighbour in the Guest Harbour.
- Grilling and open fires are strictly prohibited year-round, including disposable grills.
Norway’s fortresses are historic military structures and vibrant cultural venues, visited by millions of people each year. They are important attractions in their local communities—both as destinations and visitor sites, and as places for economic activity.
The fortresses also serve as arenas where history meets the present, and where civil society connects with the Armed Forces.
Our task as property managers is to enable development that brings life to these historic places while preserving their legacy.
We do this by keeping the fortresses open and accessible to the public, while also leasing buildings and outdoor areas to businesses that provide enriching experiences.
We are responsible for the maintenance of buildings and fortress walls, as well as the care of the surrounding grounds.
