Discover this Medieval royal palace that became a revolutionary tribunal and Marie-Antoinette’s prison. The Conciergerie Discover on the Île de la Cité, the exceptional Gothic rooms of the first royal palace of Paris and the reproduction of the prison cells of the revolutionary tribunal. At the end of the 17th century, numerous people were imprisoned in the prison of the Conciergerie, including Marie-Antoinette. The Conciergerie is also listed as a historical building by the Unesco.