The Conciergerie is the ground floor of the palace where the kings of France once lived, and its great hall is what you come for. The vaults rise eight and a half metres over nearly 1,800 square metres, usually called the largest surviving Gothic hall in Europe built for a royal court rather than a church. None of its medieval furniture survives, so the size of the room is the exhibit. Past it come the prison rooms: a corridor of cells, the room where the condemned had their hair cut, and the yard where women were let out.
The hall fed up to two thousand palace servants and soldiers a day. Philip the Fair vaulted it early in the fourteenth century. In 1358 rebels led by the merchants' provost Étienne Marcel broke into the palace and killed two of the dauphin's marshals in front of him, and the kings stopped living here after that. The officer left in charge was the concierge, and the building still carries his title. He turned part of it into a prison, and during the Revolution it held the accused waiting for the court upstairs.