The western side of the Ile de le Cité is mainly dedicated to justice. On the front, you can see the Tribunal de commerce, a court of trade specialized in business and companies rights. Behind, the court of justice, hold the criminal and civils cases.

In the middle, the tower of the conciergerie is famous because of the oldest clockwork still working on its side. This clock saw Marie Antoinette left this court on her last travel.