In 1086 Isleham was a demesne vill of the king (6 hides and 40 acres). A
further 1½ hides and 20 acres were held by the Bishop of Rochester under
Archbishop Lanfranc. Hugh de Port had another holding of the same size, and
Count Alan's 40 acres were held under him by Geoffrey. The Priory was founded
as a cell of the Benedictine Abbey of St Jacut-de-la-Mer, in Brittany. It was
suppressed in 1414 and given by Henry VI to Pembroke College, Cambridge. The
new owners demolished the priory buildings except for the church, which they
converted into a barn. This was its use until 1944. It is now an English
Heritage property.