The ConciergerieLa Conciergerie

The Conciergerie occupies the riverside remains of the medieval Palais de la Cité on the Île de la Cité, where Capetian kings staged authority in vast 14th c Gothic halls. When the court moved away, it hardened into a seat of justice, then a Revolutionary prison in 1793–94, holding thousands—including Marie Antoinette—on the way to the guillotine. Its vaults still feel like a hinge between royal splendour and modern political violence.