2 Boulevard du Palais, 75001 Paris France
The Royal Palais de la Cité (dates back to 10th century) consisted of the Conciergerie, Palais de Justice and the Sainte-Chapelle.
Conciergerie building served as a prison. Today a part of the Conciergerie building is used as a courtroom, but a part of the building is open for visitors.
