Penhow Castle, situated in the countryside between Chepstow and Newport, claims to be the oldest inhabited castle in Wales. It was built as a home for one of the knights who served the Lord at Chepstow Castle. Sir Roger de St Maur was the first Norman owner of Penhow and he built a tower house in which to live. Documentary evidence shows that he was at Penhow by 1129. It was the first British home of the family who would later rise to national prominence under the more familiar name of Seymour.