Using this information as a base,[2] the group of anonymous artists and citizens have since restored much of Paris's underground infrastructure, including the Panthéon clock, which chimed for the first time in many years after its repair.
In October 2007, they received attention for a project, assisted by professional clockmaker Jean-Baptiste Viot, to clandestinely restore the famous clock in the Panthéon.
La Mexicaine De Perforation (The Mexican Consolidated Drilling Authority) is another subdivision of the UX which provides clandestine artistic events.
[3] In September 2004, French police discovered an underground movie theatre run by La Mexicaine De Perforation.
When the police returned for a formal investigation, all the equipment had disappeared — all that was left was a note on the floor reading, "Ne cherchez pas" ("Do not search").