It was repaired in the early 15th century in response to the native uprising led by Owain Glyndŵr before falling into ruin.
Fe’i hatgyweiriwyd tua dechrau’r 15fed ganrif mewn ymateb i’r gwrthryfel brodorol dan arweinyddiaeth Owain Glyndŵr cyn mynd â’i ben iddo.