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:Visby Cathedral (also known as St. Mary’s Church) is the only survived medieval church in Visby. It was originally built for German merchants and inaugurated in 1225. Around the year 1350 the church was enlarged and converted into a basilica. The two-storey magazine was also added then above the nave as a warehouse for merchants.
Following the Reformation, the church was transformed into a parish church for the town of Visby. All other churches were abandoned. Shortly after the Reformation, in 1572, Gotland was made into its own Diocese, and the church designated its cathedral.
There is not much left of the original interior. The font is made of local red marble in the 13th century. The pulpit was made in Lübeck in 1684. There are 400 graves under the church floor.