The first castle in Głogówek was built by the Piasts from the Opole line probably in the 13th century. In the years 1532-1561, the Zeidlitz family took the castle over from the previous owners; in 1561 it was in possession of the Oppersdorffs. They decided to demolish the Gothic building and replace it with a Renaissance structure which has survived - only with minor transformations - to the present day.
The first project was the upper castle with the duke’s chamber and corner towers (1561-1606); from 1606, the lower castle was developed along with a chapel. In the years 1743-1781, the sough wing of the lower castle was expanded and Baroque detailed were added; in the mid-19th century, part of the castle was rebuilt under the supervision of an architect named Gluck.
During the Swedish invasion in 1655, the castle was home to King Jan Kazimierz and his court, and in 1806 it was visited by Ludwig van Beethoven fleeing from the Napoleon’s army.In 1945 the last member of the Oppersdorff family left the castle which has ever since changed hands and has served different functions: youth hostel, regional museum, art gallery, and culture centre. Today, the building is owned by the municipality again and restoration works are underway.
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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.