The Brusselpoort is the sole remaining city gate of the original twelve gates of the city of Mechelen. This imposing structure dates from the 13th century. Because of its exceptional height, towering above the other gates, it was also called the 'Overste poort' (superior gate). In the 16th century, the towers were lowered and the roof construction was altered to the present configuration. In the course of the centuries, the building had many different uses from police station to youth center, from duty collector's office to artist's workshop.
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.