On higher ground on the south side of the village are the remains of
Hardham Priory, the Priory of St Cross, which was an
Augustinian monastery established in the middle of the 13th century. In the late 18th century a canal tunnel was built on the
Arun Navigation to avoid a large loop of the
River Arun. The railway line from to passed over the tunnel, and when the canal closed the railway company broke into the tunnel and filled that part of it under the rails with
chalk. On 18 October 2019 the tunnel was
Grade II listed. On 1 April 1933 the parish was abolished and merged with Coldwaltham. ==References==