 It was apparently assaulted in 1246, because it was mentioned in an ancient chronicle "Annales Cambrie", where a siege of the castle by the seneschal of Carmarthen was mentioned.He was apparently acting on behalf of its "rightful owner", but who that rightful owner was or whether the siege was successful is not known.It may have been that Rhys Gryg built the two fortresses of Dryslwyn and Dinefwr in order to provide legacies for his two sons after his death, which happened in 1234.