The King Friedrich Wilhelm I Fort (Fort Nr. 3), originally known as Quednau, was the largest fort of Königsberg fortification system. The fort was situated at the top of a height and surrounded by dry ditch. There were embrasures for defensive fire. In time of Kongsberg Storm the Fort was of severe resistance. Garrison remains was captured on the 9th of April 1945. After the WWII there was the army division in the Fort. Archeologists have found more than 30 000 objects from the ex- museum “Prussia”, when the division left.
References: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.