Skenfrith Castle is an 11th century earth and timber ringwork and bailey fortress, founded by William fitz Osborn. In the late 12th century, King Henry II founded the stone castle, when encasing the platform with a curtain wall, flanked by a small square keep. In the early 13th century, Hubert de Burgh demolished the earlier fortress and founded the stone keep and courtyard castle, on the levelled site. The circular three storey keep, stands in the centre of the sub-rectangular platform, which was encased by a wide stone revetted moat. The high curtain wall, was originally flanked by round three storey angle towers, a solid D-shaped tower and a gatehouse. 5 miles north-west is Grosmont Castle and 7 miles south-east is Monmouth Castle.