In the heart of the historical center, on the grounds of the ancient Archbishop's Palace, lies The Armoury (Rustkammeret)—a place where the military past of the Trøndelag region comes to life. This museum is rightfully considered one of the oldest in the country, and its walls preserve the memory of the great campaigns and daily service of warriors from various eras for which Trondheim is famous.

The exhibition covers a vast span of time, starting from the legendary Viking Age and ending with events of modern history. Here, Norway is presented to guests through the prism of its victories and trials, showcasing unique collections of weapons and equipment gathered over many decades.
The museum occupies three floors and offers visitors free access to its treasures. This makes it one of the city's most accessible yet meaningful attractions, where informative descriptions in English and Norwegian help provide a complete understanding of the development of military affairs in the North.