Be dazzled by the 1,113 stained glass windows at this jewel of the Rayonnant Gothic period. The Sainte-Chapelle The first of the Holy Chapels to be decorated with exceptional stained-glass windows. Known for having housed Christ’s Crown of Thorns, it has spectacular stained-glass windows. Veritable walls of light that make the Sainte-Chapelle the jewel of French Gothic. Free for under 18s, and 18-25s from the European Union.