It belongs to the zone classified as World Heritage Site by UNESCO.
Before 1307, the square was located on the lands owned by the Knights Templar, who had a command post there.
After the Knights Templar's eviction, the Celestines installed a monastery which, despite some fires, remained for almost 400 years.
Within the square, a kind of refracting telescope provides a kaleidoscope view of the car park below.
[2] Its most notable monument is the Théâtre des Célestins, designed by Gaspard André, and inaugurated in 1877, then in 2005.