Between numbers 1 and 3 of the Rue Chapon in the 3rd arrondissement stands a door numbered 1 Bis. It looks much like any other door in the street, but there is one major difference - behind this door there is only a wall.
The door and associated decoration is in fact a creation by artists Julien Berthier and Simon Boudvin called Les spécialistes, and was originally placed on this wall early one Saturday morning in 2006. As no permission was asked for and none granted, the artists were surprised not only that it was still in place three years later, but also that the city authorities regularly kept it clean.
Three more years have passed and it is still firmly fixed to the wall. It looks solid and reasonably clean, and appears perfectly at home here. The artists had chosen their spot carefully and designed the door and wall following typical architectural styles of the area, but it is nevertheless a surprise to find an unauthorised creation that has lasted for so long in a world of fussy officialdom.