Caricature showing the opening of the l'Armoire de fer. On the right, the worker Gamain who created this safe for the French king Louis XVI and who opens it during the Révolution for the ministre Roland on the left. The skeleton of Mirabeau get out the safe : the documents found in the safe show secret letters between Mirabeau and the royal family and will leave to get him out from the Panthéon. In a medalion above the door, the king Louis XVI is shown like a snake.