West tympanum, part of a western extension to an earlier building; remains have been excavated.
Set out and lay footings and bases for the choir.
Resumption of work on the choir walls with remaining capitals.
Choir aisle piers in at least two large campaigns with aisle vaults
Gallery bases 1; choir gallery constructed slowly in four or more campaigns in a complex process that explains the many changes in profiles and details that remain in spite of extensive renovations
Gallery bases 2; capitals phase I starting in the north
Gallery bases 3; capitals phase II north gallery vault
Gallery bases 4; capitals phase III, middle vaults and walls raised to clerestory level at the crossing with two capitals, either in this campaign or the one before
Gallery capitals IV, remaining vaults
Choir roses and clerestory
Choir clerestory windows designed for a lower junction against the wall, possibly the stage described in the Torigny letter of 1177.
Choir cornice a single row of 'teeth' with a timber roof, but the vaults were not erected ex the bosses and extra rows of teeth in the cornice.
Foundations for crossing and nave 1-6 in a number of campaigns
Nave aisle capitals 1-6, arcade arches and aisle vaults
Foundations extended gradually to the west during the 90s, and pilier cantonne to bay 8, capitals all in the 1200s.
Coursing around the western portals wall shows that capitals over W.s installed when jambs of W-w half up and W.n plinths just started in a complex history; allowing for replacements all capitals appear from the same epoch
Nave gallery 1-6, in stages as shown by joint WN3-4 in wall
West crossing capitals, next three or four bays of nave and extension into first bay of transepts
Nave gallery 8-11, clerestory 1-7 in a number of campaigns
Replace choir triforium oculi and lower the clerestory window sills, then install high vault, while the roof was raised and the cornice height increased by two courses to bring the choir to the same height as the nave
Choir vauts and flyers to choir only, none to transepts.
Nave clerestory first two 6-part vaults with heads in the boss, cornice somewhat higher than choir.
West clerestory and vaults; west front to top of tower I, clerestory nave western three 6-part vaults with big bosses
Completion of west front, western vaults and towers
Nave chapels dated in the documents to 1236-41
Complete western towers, rebuild transpet terminal walls