Abergavenny is a market town and community in Monmouthshire, Wales. Abergavenny is promoted as a "Gateway to Wales"; it is approximately 6 miles from the border with England and is located where the A40 trunk road and the recently upgraded A465 Heads of the Valleys road meet. Originally the site of a Roman fort, Gobannium, it became a medieval walled town within the Welsh Marches. The town contains the remains of a medieval stone castle built soon after the Norman conquest of Wales.