Inverting vandalism, the Urban eXperiment or UX, is a group of artists who preserve fading Parisian landmarks–after surreptitiously breaking into them. The opening of “The New French Hacker-Artist Underground,” Jon Lackman’s Wired article about the group:

“Thirty years ago, in the dead of night, a group of six Parisian teenagers pulled off what would prove to be a fateful theft. They met up at a small cafè near the Eiffel Tower to review their plans—again—before heading out into the dark. Lifting a grate from the street, they descended a ladder to a tunnel, an unlit concrete passageway carrying a cable off into the void. They followed the cable to its source: the basement of the ministry of telecommunications. Horizontal bars blocked their way, but the skinny teens all managed to wedge themselves through and ascend to the building’s ground floor. There they found three key rings in the security office and a logbook indicating that the guards were on their rounds.

But the guards were nowhere to be seen. The six interlopers combed the building for hours, encountering no one, until they found what they were looking for at the bottom of a desk drawer—maps of the ministry’s citywide network of tunnels. They took one copy of each map, then returned the keys to the security office. Heaving the ministry’s grand front door ajar, they peeked outside; no police, no passersby, no problem. They exited onto the empty Avenue de Sègur and walked home as the sun rose. The mission had been so easy that one of the youths, Natacha, seriously asked herself if she had dreamed it. No, she concluded: ‘In a dream, it would have been more complicated.’

This stealthy undertaking was not an act of robbery or espionage but rather a crucial operation in what would become an association called UX, for ‘Urban eXperiment.’ UX is sort of like an artist’s collective, but far from being avant-garde—confronting audiences by pushing the boundaries of the new—its only audience is itself. More surprising still, its work is often radically conservative, intemperate in its devotion to the old. Through meticulous infiltration, UX members have carried out shocking acts of cultural preservation and repair, with an ethos of ‘restoring those invisible parts of our patrimony that the government has abandoned or doesn’t have the means to maintain.’ The group claims to have conducted 15 such covert restorations, often in centuries-old spaces, all over Paris.”