
Prudhoe Castle in Northumberland is a commanding Norman fortress dating from approximately 1095, built by Robert de Umfraville to control the Tyne valley and cross-country routes from Newcastle to Carlisle. The castle's strategic position enabled it to resist Scottish sieges during the 1170s, uniquely becoming the only Northumberland castle to remain unconquered during William the Lion's invasion. Originally comprising earth-and-timber defences, the castle evolved with the addition of a stone gatehouse and keep by the mid-12th century. Following its decline into ruin during the 1700s, the castle underwent complete restoration in the early 1800s and is now managed by English Heritage, offering visitors displays that illuminate its rich medieval heritage.