Near the German border, in Westerwolde (Southeast Groningen), is the fortress Bourtange.
In 1580 William of Orange gave the order to build a fort on the sand ridge in the Bourtanger moor, on the border of modern Germany. On the order of William Louis of Nassau the fortress was raised in 1593.
Between 1593 and 1851 Bourtange was an important fortress. An agrarian village came into being when the fortress was dismantled in 1851. Only a few buildings still remembered the glory of yesteryear. In the nineteen sixties the county of Vlagtwedde took the initiative to reconstruct the fortress. The plan was implemented between 1967 and 1992. Ramparts were again raised, ditches were dug and soldiers’ barracks were built.
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.