Originally built in the 17th century to protect the harbor of Stavern close to Larvik, the Citadel later became the base of Tordenskjold in the 11-year war between Sweden and Norway/Denmark in 1709 to 1720. Later the fort would become the headquarters for the Norwegian navy.

In the early 20th century, the navy headquarters was moved and fortress became a summer recidense for many of Norways artists at the time.

Because of the rich history of the Citadel, the fortress has become a popular tourist attraction in the Larvik area. To protect this historical landmark consisting of the original stone tower and walls and wooden buildings, VID Fire-Kill was asked to provide the the protection of the wooden structures.

Because of the small dimensions and easily concealable nature of the Model APS and N-Pipe systems, and the reliable operation of the Model C-EL Deluge valve, a VID Fire-Kill deluge system was installed.