The "clearstory window of St. Leu d'Esserent, France" showing a sexfoil window, of six petals. -Whitney,…
Illustration of a spire of the Senlis Cathedral in France, early 13th century. It is "one of the earliest…
"Flamboyant Tracery, Rouen Cathedral, Normandy" showing the intersecting ribs of tracery in windows…
The Nave of Bourges Cathedral in France showing the sexpartite vaulting, divided into six parts.