The Palais de Justice, is a courthouse in Paris, located on the Île de la Cité. It contains the Court of Appeal of Paris, the busiest appellate court in France, and France's highest court for ordinary cases, the Court of Cassation. It is located on the site of the medieval Palais de la Cité, the royal palace of the Kings of France, and is next to the Sainte Chapelle, the royal chapel. The current building was largely constructed under Louis XIV, and later, from 1851 to 1914, under Napoleon III and his successors, by the architects Joseph-Louis Duc, Honoré Daumet and A. Tournaire.
The Tribunal de grande instance de Paris, previously located in the Palais de Justice, was moved in 2020 to a new building in new Judicial center of Paris in Batignolles in 2020.