
Monmouth Castle was built between 1067 and 1071 by William fitz Osbern on a hilltop overlooking the confluence of the River Wye and River Monnow. The castle is renowned as the birthplace of King Henry V in 1387, an event commemorated in nearby Agincourt Square. The best surviving features include a 12th-century tower and 13th-century great hall, with sections of castle walls offering breathtaking countryside views. The Monmouthshire Royal Engineers Regimental Museum occupies the castle grounds, housing exhibits detailing the regiment's history and Wales' wider military heritage from formation to the present day.