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This is from the other Sainte-Chapelle, the one at the Chateau de Vincennes. (There are probably lots of other Sainte-Chapelles, but those are the two I visited.) It’s a wildly different space, with cream-colored walls painted in very few places, apart from this emblem painted on repeatedly on the ceiling high above. I, er, have a possibly obsessive tendency to photograph interesting ceilings, so of course this detail drew my eye.