Devout King Louis IX (St Louis, 1226-70) had a hobby of accumulating holy relics. In the 1240s, he bought what was advertised as the Crown of Thorns, and ordered Pierre de Montreuil to design a shrine. The result was Sainte-Chapelle. With 15m (49ft) windows, the upper level appears to consist almost entirely of stained glass. The windows depict hundreds of scenes from the Old and New Testaments, culminating with the Apocalypse in the rose window.
Sainte-Chapelle

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