However the castle is mentioned in the third branch of the Mabinogi as the place where Rhiannon was imprisoned and forced to carry travellers through the gates as penance for killing her son.
Excavations[3][4] have found more than 20 graves on the north side dating from the 12th century to the 13th, hinting that the area may have once been the site of a church.
In the early part of the 20th century, the annual town fair held a procession which ended in the castle, with dancing and music.
The castle has provided a good deal of building material for the surrounding houses and the remains are mostly single and double storey walls, with the barrel-vaulted kitchen cellars intact.
There is an early engraving visible on an information board at Narberth railway station (and possible elsewhere in the town) which shows now-vanished tall chimneys of a Flemish style that can still be seen at the well-preserved Manorbier Castle.