The Artillery Museum of Finland is a special military museum dedicated to the history of the artillery from the 15th century to the present day. It was located in Niinisalo from 1977 to 1997 and in 1997 relocated to Hämeenlinna.
There are almost a hundred guns, grenade launchers and rocket launchers of different make from 13 different countries. The gun collection of the museum is unique, the most comprehensive in the Scandinavia. As far as it is known there is no other museum outside Russia with a collection on Russian and Soviet artillery equipment as exhaustive as this.
The buildings of museum, Linnankasarmi, date back to the Russian regime, to the Autonomy 1809–1917. The construction of the barracks started in 1850 and was completed in 1913. The archaeological committee values Linnankasarmi quite highly as a traditional military area and prehistoric site because the medieval town of Hämeenlinna has once been here and its remains are still under the barrack yard. More over, Häme Castle is right next door and its century's long tradition includes also artillery.
Reference: Wikipedia
Rosenborg Palace was built in the period 1606-34 as Christian IV’s summerhouse just outside the ramparts of Copenhagen. Christian IV was very fond of the palace and often stayed at the castle when he resided in Copenhagen, and it was here that he died in 1648. After his death, the palace passed to his son King Frederik III, who together with his queen, Sophie Amalie, carried out several types of modernisation.
The last king who used the place as a residence was Frederik IV, and around 1720, Rosenborg was abandoned in favor of Frederiksborg Palace.Through the 1700s, considerable art treasures were collected at Rosenborg Castle, among other things items from the estates of deceased royalty and from Christiansborg after the fire there in 1794.
Soon the idea of a museum arose, and that was realised in 1833, which is The Royal Danish Collection’s official year of establishment.