The bronzes of many Louis XV pieces of furniture had a bronze caster’s mark made up of the letter C, surmounted by a crown, which intrigued specialists for a very long time. We now know that this mark sanctioned a tax paid between 1745 and 1749 on bronzes and copper pieces. The edict of 1745 required that “works old and new (….) which are or will be manufactured, be visited and marked”. The same text lists all the works “of pure copper, cast, moulded, beaten, planed, engraved, gilded, silvered and coloured without exception” that were required to receive the mark. Even though the royal edict seems not to have been scrupulously observed, the crowned C is sometimes found on everyday utensils.