 A large deer park , owned by the Crown , was established around the castle to provide hunting grounds . The castle was carefully positioned next to the park , which was overlooked by the motte . A vineyard was also maintained alongside the castle . The old Anglo @-@ Saxon manorial centre was moved to the site , and as a result the Anglo @-@ Saxon settlement of Berkhamsted also shifted from the area now called Northchurch to the castle ; several mills , essential for grinding flour , were present there in 1086 . 
