La Sainte-Chapelle, Paris

Located in the center of the city within the Palais de Justice complex on the Île de la Cite, La Sainte Chapelle (Holy Chapel) is a small Gothic chapel constructed in the Rayonnant style. Built by King Louis IX from 1238-1244, the chapel housed holy relics from the Passion believed to be Jesus' Crown of Thorns and a piece of the True Cross. These items were purchased from the Byzantine emperor Baldwin II in 1239 for a huge sum of 135,000 livres (the church cost 40,000 livres to build) due to the King's desire to elevate France as the leader of Western Christianity. La Sainte Chapelle provides visitors with a spectacular visual experience, since the entire upper tier of the chapel is surrounded by enormous stained glass windows.