The ruins of the great mid C12 conventual church of the Priory of St Botolph, founded at the beginning of the century as the first house of Augustinian Canons in England.
It was built almost entirely with stone and brick taken from Roman buildings.
The church survived the suppression of the Priory in 1536 as it had been the parish church of St Botolph's for some time.
It was ruined in the siege of Colchester in 1648.