Farnsburg castle ruins are the remains from the 14th century. It was built by the Counts of Thierstein between 1319-1342. In the 15th century Farnsburg lost its military purpose. The buildings were left to decay and it was easily conquered in 1653 (the Peasants' War) and finally in 1798 (by the revolting farmers). In 1798 the city Vogt was finally expelled and the castle was set on fire by landowners. The ruin was then used as a quarry.
A good starting point for a hike to the ruins is the Landgasthof Farnsburg - from here it is 20 minutes walk to the ruins. There are also BBQ and picnic facilities in close proximity to the ancient ruins.
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.