The town of Bulle initially developed around its church which was, in 9th century, an ecclesiastical center of importance. The construction of the castle began certainly under the episcopate from Boniface (1231-1239). After the annexation of Bulle by the town of Freiburg, the castle became, since 1537, residence of the bailiffs'. Since 1848, it is the seat of the Prefecture of the Gruyère and receives the Court, the state police and the prisons.
Forming a quadrilateral of 41 x 44 meters, it includes main buildings on three sides. Its construction was carried out according to plans' of the Savoyard Castles, with small towers in the 4 corners.
The keep, enormous and separated by a small court, 33 meters is high and broad of 2.16m at its base. Its entry of origin is located at 9.7m ground. Less imposing, the turns of the three other angles are little towers placed in overhang in top of the walls.
This historical fortress has escaped with the fire which destroyed the city in 1805.
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.