La Sainte-Chapelle 's a Gothic chapel on the Île de la Cité in the heart of Paris, France. It's perhaps the high point of the full tide of the rayonnante period of Gothic architecture. It's famous for housing Christian relics including the crown of thorns brought to the site by Louis IX. History The Sainte-Chapelle, the palatine chapel in the courtyard of the royal palace on the Île de la Cité, was built to house precious relics: Christ's crown of thorns, the Image of Edessa… (More on Sainte-chapelle)