The east end--chevetAfter the consecration in 1060, the walls of the crypt were strengthened and the choir was lengthened to include a semicircular apse, with blind arcades on the exterior and an arcaded gallery at the top on slender colonnettes. Two bell towers were addded replacing the earlier staircase towers on each side of the old choir. The choir itself on the exterior is pedimented with five arched niches, emphasizing the slope of the triangle. Delicate blind arcades emphasize the roofline of the pediment and the registers of the towers.
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