England–Wales border after Harold's death at the Battle of Hastings, Wales was again divided without a leader to resist the Normans. Immediately after the Norman conquest of England, King William installed one of his most trusted confidants, William FitzOsbern, as Earl of Hereford. By 1071 he had started the building of Chepstow Castle, the first castle in Britain built of stone, near the mouth of the Wye. It served as a base from which the Normans continued to expand westward into south Wales, establishing a castle at Caerleon and extinguishing the Welsh kingdom of Gwent. William also installed Roger de Montgomerie at
Old Wye Bridge, Chepstow Old Wye Bridge, Chepstow The Old Wye Bridge or Town Bridge at Chepstow crosses the River Wye between Monmouthshire in Wales and Gloucestershire in England, close to Chepstow Castle. Although there had been earlier wooden bridges on the site since Norman times, the current road bridge was constructed of cast iron in 1816 during the Regency period, by John Rastrick of Bridgnorth, who greatly modified earlier plans by John Rennie. The bridge crosses a river with one of the highest tidal ranges in the world. It carried the main A48 road between Newport and Gloucester until 1988, when a new