Castle Acre Castle and town walls are a set of ruined medieval defences built in the village of Castle Acre, Norfolk. The castle was built soon after the Norman Conquest by William de Warenne, the Earl of Surrey.
The castle had a motte-and-bailey design. Its large outer and inner baileys were protected by earthworks and palisades, and a stone gatehouse was added to the inner bailey shortly afterwards. In the centre of the inner bailey was a grand double-hall built from stone, but this was not fortified and would have been more like a country house than a conventional Norman keep.