Usk Castle in Monmouthshire occupies a site of long strategic significance, established as a Norman castle around 1120 on terrain previously occupied by a Roman legionary fortress. This partly ruined medieval stronghold played a pivotal role in the turbulent politics of the Welsh Marches, captured alternately by Welsh and Norman forces throughout the 12th and 13th centuries, and attacked by Owain Glyndŵr's forces in 1402 during his rebellion. The castle's inner ward features a 240-foot curtain-walled enclosure incorporating the keep, chapel, great hall, and three towers, with portions remaining inhabited today. Now privately owned but open to visitors for suggested donation, Usk Castle reflects the enduring strategic importance of its location and the architectural resilience of medieval Welsh-Norman border fortifications.