11. There are radiating chapels around the apse, which is a typically French feature and was to evolve into the chevette. 12. There are radiating chapels around the apse, which is a typically French feature and was to evolve into the chevet. 13. The windows in the clerestory and the light from the ambulatory and radiating chapels focus directly onto the high altar. 14. The main chapel, like in Clairvaux, is surrounded by a gallery ( ambulatory ) and has a series of radiating chapels . 15. The layout of this church resembles the plan of the basilica of San Francesco in Bologna, including the apse with radiating chapels . 16. The eastern end, which is built over a crypt, is apsidal, surrounded by an ambulatory and a chevet of nine radiating chapels . 17. The eastern apse was also extended in the Gothic style, receiving a ribbed vault and nine radiating chapels in the French manner. 18. It is built as a three-aisled basilica with side chapels, an ambulatory with radiating chapels , and vestibules like the arms of a transept. 19. From the east, it looks like a complete Gothic cathedral with flying buttresses and trefoil stone tracery in the windows of the radiating chapels . 20. The windows in the radiating chapels fared less well, and most of the surviving panels have been reassembled out of context in the axial chapel.
