Castle Acre Castle was originally an 11th century stone two storey fortified manor house, built over a late Anglo-Saxon manor house. Founded by William de Warenne, his son William, the second earl of Surrey founded the 12th century stone ringwork and bailey castle. When he absorbed the Norman manor house, in the construction of a high keep, encased by a bank and curtain wall, flanked by a gatehouse. The large bailey is encased by substantial earthworks, with the foundations of stone hall complex, a well-preserved length of curtain wall, the remains of two gatehouses and a massive barbican. Nearby is the Bailey Gate and Priory Porch-Tower. 13 miles north-west is Castle Rising Castle.