Oldest public clock in Paris

France's first public clock was installed around 1370. The current clock dates from 1535. It is mounted on the side of the Conciergerie, a former royal palace and prison in Paris, located on the west of the Île de la Cité, near the Cathedral of Notre-Dame. It is part of the larger complex known as the Palais de Justice, which is still used for judicial purposes. Hundreds of prisoners during the French Revolution were executed on the guillotines at La Conciergerie.