The Bishop's Palace is the ruined residence of the bishops of Llandaff. It is located a short distance to the south of Llandaff Cathedral in Cardiff, Wales. The twin-towered gatehouse is one of the few remaining structures.
The surviving gatehouse resembles the architecture of Caerphilly Castle, which may indicate that the same master mason worked on both fortifications. This would date the Palace to the time of William de Braose who became Bishop of Llandaff in 1266. It is believed the Palace was attacked and damaged by Owain Glyndŵr in the rebellion of 1402–05, and was subsequently abandoned by the bishop of the period, who moved to live at Mathern Palace in Monmouthshire; bishops did not return to live near their cathedral again until 1850. The Bishops Palace was intact in 1610 when it was shown in a plan by John Speed, but was probably destroyed during the English Civil War.
The Bishop's Palace was really a small medieval fortress set in a rectangular enclosure measuring 52 by 40 m. It had four irregular lengths of curtain wall, three towers and a gatehouse at the west corner. One of the towers was square and another was round, while the third has disappeared completely. The remains of the gatehouse survive to this day. It has two towers and originally had two storeys above the basement, a vaulted archway, a portcullis slot and a great oak door with much decorative ironwork. There would have been timber buildings within the courtyard, but there is now no sign of these.
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.