Monmouth is the historical county town of Monmouthshire in Wales and also an area. Located where the River Monnow signs up with the River Wye, simply 2 miles (3.2 kilometres) of the boundary with England. The town is 30 miles (48 km) northeast of Cardiff, and also 113 miles (182 km) west of London. It is within the Monmouthshire regional authority, and also the parliamentary constituency of Monmouth. Monmouth's population in the 2011 census was 10,508, rising from 8,877 in 2001. The community was the site of a tiny Roman ft, Blestium, and also became developed after the Normans constructed a castle right here after 1067. Its medieval rock gated bridge is the just one of its type remaining in Britain. The castle later entered into the possession of the House of Lancaster, and was the birth place of King Henry V in 1387. In 1536, it ended up being the county town of Monmouthshire. A market community as well as an emphasis of instructional and also social tasks for the bordering backwoods, Monmouth has actually ended up being a tourist centre at the heart of the Wye Valley.