Aalborghus Castle

The buildings are not open to the public, but the inner courtyard and the surrounding park can be visitedIt is also possible to visit the fortress vaults and the dungeon in summer.

Aalborghus Castle was built on the orders of King Christian III between 1539 and 1555 and rebuilt under Christian IV in the first half of the 17th century. Originally built as a fortress, the castle soon served as the residence and administrative headquarters of the northern Danish provincial governors and as a trading point for the taxes and contributions in kind collected there; it was not used as a royal residence.The castle, which is located directly on the Limfjord, was once a rectangular castle complex completely surrounded by water and protected by high ramparts. The oldest section of the building complex is the east wing, built under Christian III, which has two floors on the courtyard side and one floor on the rampart side and is connected to the north wing built under Christian IV. The western side of the courtyard is closed off by the partially preserved rampart system, the south side is now open and is bordered by a free-standing building from the 19th century. The half-timbered building is simple in its architectural style and the stepped gables of the older wings are reminiscent of Gothic and Nordic Renaissance architecture.The castle still serves as an administrative building and houses various Danish authorities. The interior rooms cannot be visited, but the courtyard and the ramparts are open to the public. In the casemates under the western rampart, the history of the building is presented to visitors on information boards.de.wikipedia.org/wiki/Schloss_Aalborghus

Commissioned by Danish King Christian III in 1555
Actually intended as a fortress but never was sufficient for it. Then seat of the king's liege in North Jutland