Barnwell Castle is a 13th century stone enclosure fortress, founded by Berengar le Moygne. This large rectangular castle, is encased by a high curtain wall, which is flanked by huge two storey towers. At the south-east corner, is a twin-towered gatehouse and a D-shaped tower, with two trilobate towers and a round tower on the other angles. In 1568, Sir Edward Montagu founded a Tudor manor house, in the outer court and sadly demolished all the buildings within the courtyard. 3 miles south-west is Wadenhoe Castle and 5 miles north-west of Benefield Castle.