Norman era A Norman-style motte and bailey castle was built outside the eastern corner of the old Roman fort, possibly by the Welsh Lord of Caerleon, Caradog ap Gruffydd. The Domesday Book of 1086 recorded that a small colony of eight carucates of land (about 1.5 square miles) in the jurisdiction of Caerleon, seemingly just within the Welsh Lordship of Gwynllwg, was held by Turstin FitzRolf, standard bearer to William the Conqueror at Hastings, subject to William d'Ecouis, a magnate of unknown antecedents with lands in Hereford, Norfolk and other counties. Also listed on the manor were three Welshmen with as many ploughs and carucates, who continued their Welsh customs (leges Walensi viventes). Caerleon itself may have remained in Welsh hands, or may have changed hands frequently.
Norman era A Norman-style motte and bailey castle was built outside the eastern corner of the old Roman fort, possibly by the Welsh Lord of Caerleon, Caradog ap Gruffydd. The Domesday Book of 1086 recorded that a small colony of eight carucates of land (about 1.5 square miles) in the jurisdiction of Caerleon, seemingly just within the Welsh Lordship of Gwynllwg, was held by Turstin FitzRolf, standard bearer to William the Conqueror at Hastings, subject to William d'Ecouis, a magnate of unknown antecedents with lands in Hereford Norfolk and other counties. Also, listed on the manor were three Welshmen with as many ploughs and carucates, who continued their Welsh customs (leges Walensi viventes). Caerleon itself may have remained in Welsh hands, or may have changed hands frequently.