 It was apparently at Rhug that King Gruffudd ap Cynan was staying when he was betrayed by Meirion Goch of Llŷn, in 1080.Hugh Lupus, Earl of Chester and Hugh, Earl of Salop, hearing that the prince was at Rhug came with a group of soldiers under the pretence of visiting him.Meirion Goch persuaded Gruffudd to go with a small guard to meet them, not knowing of the kidnapping plot by the earls, and was seized and carried off to Chester Castle.