Pen y Clawdd Castle is a ditched mound with a double moat, roughly circular in shape, with a diameter of approximately 28m to 30m and about 2.4m high. The castle is in Llanvihangel Crucorney, about five miles to the north of Abergavenny, Monmouthshire, in south east Wales and lies between the Usk and Monnow rivers.^[2][3] The mound was designated a scheduled monument in 1950 and described as a defensive medieval motte.^[4]

• http://en.wikipedia.org/wiki/Pen y Clawdd Castle