 Substantial remains are still present today, including a rare cylindrical keep, a curtain wall flanked by two half-round towers, a twin-towered gatehouse and an angled tower.A survey conducted in the nineteenth century identified five towers ranging from 35 to 41 feet external diameter, and the keep, 50 feet in diameter.One author has noted similarities of the plan to Montlhery near Paris, France, which Ranulph de Blondeville may have been familiar with.