The purported relic of the Crown of Thorns, the wreath of thorns placed on the head of Jesus at his crucifixion, is kept in the treasury of Notre-Dame Cathedral in Paris. It is said to have been transferred from Jerusalem to Constantinople by 1063. About 1238 King Louis IX of France took the relic to Paris and had the Sainte-Chapelle built (1242β48) to house it.
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