Sainte-Chapelle is a royal Gothic chapel built within the medieval palace complex on the Île de la Cité. King Louis IX commissioned it to house his collection of Passion relics, including the claimed Crown of Thorns. The upper level holds 1,113 stained glass windows that flood the space with colored light—nearly two-thirds of the glass survives from the 13th century.
Construction began after 1238 and the chapel was consecrated on 26 April 1248. The structure rises 42.5 meters high, with two levels serving entirely different purposes: the upper chapel was reserved exclusively for the royal family and their guests, while the lower level served courtiers and palace staff. Louis IX paid 135,000 livres for the relics themselves—more than three times the 40,000 livres spent to build and glaze the entire chapel.
You climb the spiral stair and step into the upper chapel. The walls dissolve into glass. Fifteen lancet windows, each reaching floor to vaulted ceiling, wrap the space in saturated reds and blues. Light shifts as clouds pass. The stone ribs seem to float, and the narrow interior amplifies the vertical pull—your eye travels up, then across the glowing narrative panels that circle the room.