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Experiments in rib vaulting at Durham Cathedral, England: c. 1093ff, vaulted ca. 1130; prototype "flying buttress" (actually quadrant arch in gallery)
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Caen, France, St. Etienne (Abbaye aux Hommes), c. 1067-87: "folded" square bay shape; true six-rib vaults around 1100 or 1120
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St.-Trinite, Caen, France, c. 1062, vaulted around 1135: pseudo-sexpartite vaults in domical square bays with false six-rib configuation.
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Notre-Dame, Paris, first real flying buttress, ca. 1180; facade ca. 1200--1250
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Beauvais Cathedral, collapsed after 1225, perhaps because of poor central
pier
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Amiens Cathedral, begun 1220, completed about 1275: vaults; transverse section through choir; interior nave elevation; aerial view; facade view today
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Ste.-Chapelle, Paris, 1243-48: old miniature view of interior; interior
today
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Chartres Cathedral, interior, begun 1194: nave interior; side aisle view; detail clerestory, triforium, and springing of rib vaults
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