The Crown of Thorns – comprising a circle of rushes encased in a crystal and gold tube – was brought back to the newly restored cathedral in a ceremony overseen by the Archbishop of Paris, Laurent Ulrich.
The crown was acquired by King Louis IX of France in Constantinople in 1239 for 135,000 livres – nearly half France’s annual expenditure at the time.
Initially kept at the Sainte-Chapelle, it was moved to Notre-Dame’s treasury in 1806 where it remained until the fire which ripped through the 850-year-old building.