Date : XVIth century | Medium : wrought iron, chiseled, etched, openwork, assembled with rivets and screws
The lock is completely concealed behind two architectural panels that open like doors. Four windows, among interlacing openwork network and lilies, make up the decor of its base adorned with gadroons. A hidden latch in one of them activates the opening of the doors and shows the keyhole and the double hasp settings (now disappeared). Three partially fluted pillars decorated with foliage support a cornice adorned with etched foliage. The cap conceals a mechanism with two springs in the form of fabulous animals. The highly complex locking system consists of three bolts (two on the side) and a double trigger in the centre, supported by a false Corinthian column.