The bishop’s palace in Llandaff was erected at the end of the 13th century, probably on the initiative of bishop William de Broase. At the beginning of the 15th century it was destroyed during the Welsh uprising of Owain Glyndŵr. The bishops left Llandaff at that time, although the defensive court survived until the time of the English Civil War. Probably then it was finally destroyed and demolished.
The bishop’s palace was a small, fortified structure erected on a plan similar to a rectangle measuring 52 by 40 meters. The defense was provided by a single circumference of the walls reinforced with three towers. One of them on the east side was cylindrical, the other on the south side was four-sided, the third one did not have a recognized shape. On the west side, in the corner of the walls, there is a gatehouse consisting of two towers flanking the passage. Each tower had two floors above the basement, and the gate was equipped with a portcullis and oak doors with iron fittings. There were timber and wattle and daub construction houses standing in the inner ward. Probably in the northern corner there was a stone building of the great hall, possibly connected to an unrecognized tower.
To this day survived the lower part of the twin-tower gate, a fragment of the western curtain of the defensive wall and the ruins of the south-eastern round tower and the south-western four-sided tower. Entrance to the monument is free.
Kenyon J., The medieval castles of Wales, Cardiff 2010.
Website coflein.gov.uk, Bishop’s Castle, Llandaff Castle Palace, Bishop’s Palace.