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Message: <blockquote data-quote="Blue439" data-source="post: 829062" data-attributes="member: 53455">It does indeed. However, you see that the traditional barrel arches (in fact they are so low in that crypt that they could preferably be called “basket handle arches”) are only used in what are called “transverse arches”, i.e., those arches that are supported by thick pillars on the sides, so that those transverse arches can, in turn, support part of the vaulting.Wherever the vaulting is “thrown across the void”, basically (i.e., between the side pillars), rib vaulting is used to direct the thrust towards the four corners.In the second photo, you see the deep end of the crypt, with the altar where the bones of Saint Giles were. Rib vaulting was also used there, even though there are supporting walls on each side. Your question prompted me to wonder why, and I looked at the floor plan. There I saw that the bell tower, which was largely truncated during the French Revolution, was originally standing right above that row of the crypt. Because of the additional weight, the architects deemed it prudent to use rib vaulting here as well, to better direct the thrust from that weight. Ar least that’s what seems logical to me... but I am no architect!  <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite30" alt=":geek:" title="Geek    :geek:" loading="lazy" data-shortname=":geek:" /></blockquote>

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