The building today includes elements of very mixed periods. On the corner of quai de l'Horloge and boulevard du Palais, the horologe tower ( tour de l'Horloge ) dates from the 14th century. It is decorated with the first public horologe of Paris, which has often been restored but is no longer operational. The north facade of the palace was bathed by the Seine until the building of the quays in 1611. The three round towers date from 1300. Today the entrance to the Conciergerie is here. The second is the " tour d'Argent " (silver tower) so called because it was here that the Royal treasure was deposited. The third tower is called the " tour Bonbec " (slang for talkative in French). Here prisoners were made to talk by means of torture. The towers and the bottom sections of the Palais are remnants of the Royal fortress of the Capétiens. The upper parts were rebuilt in the 1860's by Le Duc in a Gothic revival style. It was also Le Duc who built the imposing facade of the Cour de cassation (reversed litigation court) to the west. To open up the perspective on the new neoclassical building, he destroyed one side of the Place Dauphine.