peterborough cathedral

the back wall of the 3 giant arches of the west front was built to take arches and vaults of a different design, with the side arches slightly smaller than the central one. the effect of widening them shows here in the skewed vault, and in the doors no longer being central to each outer arch. these changes were made in the process of building between 1180 and 1238 in order to widen the west front as an external reredos such as was produced at wells etc. at this time.