Portchester Castle

Portchester Castle stands on the Hampshire shore at the head of Portsmouth Harbour. Its massive Roman walls, built in the late 3rd century to guard against Saxon pirates, still enclose a medieval fortress. The Normans added a stone keep in the late 11th century, and later kings turned it into a royal residence and military base. The castle was a favourite of King John, who used it as a staging point for campaigns in France. In 1216 it was captured by French forces before returning to English control. For centuries it served as both a palace and a prison for high-ranking captives. The site’s strategic value is clear from its long history. The Romans chose this spot for one of their strongest coastal forts, the best preserved north of the Alps. After the legions left, Saxons built a hall inside the walls and Edward the Elder made it a fortified burh against Viking raids. The castle’s royal apartments housed Henry II and his court, while the inner ward saw campaigns against rebellious barons. Edward II spent over £1,100 reinforcing its defences in the 14th century. A plot to overthrow Henry V was foiled here, an episode later dramatised by Shakespeare. Visitors walk through the Roman gateways into the medieval inner ward. The 12th-century keep rises beside the ruins of the Augustinian priory founded in 1128. St Mary’s Church, built in the 1130s, still stands in the south-east corner. The outer walls stretch for nearly a kilometre, enclosing grassy baileys and crumbling towers. From the battlements there are wide views over the harbour and the Solent. The castle’s layered past is visible in every stone, from Roman brick to Norman masonry.