In Paris, a chance to see relics of Christ’s passion, including the crown of thorns

This is news to me: 

The cathedral Notre-Dame de Paris is exposing relics of the Passion of Christ for the veneration of the faithful: the Crown of Thorns, a piece of the True Cross and one of the nails of the Passion will be exposed each Friday of the month at 3 pm, each Friday of Lent at the same time, and on Good Friday from 10 am to 5 pm.

The veneration of the instruments of the Passion of Christ has been mentioned since the 4^th century in the accounts of pilgrims who travelled to Jerusalem, in particular the True Cross discovered by St.Helena, mother of the emperor Constantine, shortly after the Council of Nicea in 325. Between the 7^th and 10^th centuries, the relics were progressively transferred to Constantinople and the chapel of the Byzantine emperors to protect them from looting such as that carried out at the Holy Sepulchre during the Persian invasions.

Read more about the history of these relics.