Priory Porch-Tower, is the 16th century two storey stone porch, of the prior's lodging. With a wide four-centred arch, it stands in front of an earlier 12th century porch, which was originally the main entrance into the west cloister range. A stopping point for pilgrims over the centuries, the Cluniac priory at Castle Acre was founded in the 12th century, by William de Warenne, earl of Surrey. Nearby are Castle Acre Castle and the Bailey Gate.