The crossing tower, begun just after 1100, was completed by Abbot Anselm
damaged later and rebuilt in stages from 1361.
Beyond the site of the High Altar the ground drops sharply: the 5-bay chancel is missing but the crypt below it, which is the oldest surviving part of the Abbey, built under Abbot Baldwin soon after 1066, is clearly laid out: the outer walls rise above the level of the former window sills and the bases of most of the columns along the line of the ambulatory remain.
Scheduled Ancient Monument.