Abergavenny (/ˌæbərɡəˈvɛni/; Welsh: Y Fenni pronounced [ə ˈvɛnɪ], archaically Abergafenni meaning "mouth of the River Gavenny") is a market town and community in Monmouthshire, Wales. Abergavenny is promoted as a Gateway to Wales; it is approximately 6 miles (10 km) from the border with England and is located where the A40 trunk road and the 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.