Conciergerie

The Conciergerie's origins reach back to the 10th century, but it was under King Philip IV in the early 1300s that the building was transformed into the primary royal residence in Paris. The court remained here until the late 14th century, when Charles V relocated it to the Louvre and other palaces, leaving the building in the care of the concierge, a royal official responsible for managing it — the source of its current name.

Its Salle des Gens d'Armes, the Hall of Men-at-Arms, was built around 1302 to feed the palace's several thousand staff in a single vast Gothic space, and it remains one of the largest surviving examples of secular medieval architecture anywhere in Europe. Walking through it today gives a rare, direct sense of the scale medieval royal households operated on.

From the 14th century onward, the building doubled as a prison and courthouse, a role that turned gruesome during the Revolution's Reign of Terror, when it held prisoners awaiting trial and near-certain execution at the guillotine nearby. An estimated 2,700 prisoners passed through its cells during the Terror alone, and the building earned a grim nickname among Parisians at the time: "the antechamber of death."

The most famous of those prisoners was Queen Marie Antoinette, who spent her final ten weeks here in a cramped cell before her execution in October 1793. Her cell has since been reconstructed as a memorial chapel, one of the most visited and quietly affecting corners of the building today.

Alongside Marie Antoinette's memorial chapel, visitors can see the Bonbec tower, once used for interrogation, and the full sweep of the Salle des Gens d'Armes described above. A Histopad tablet tour is available on site for those who want more context on the building's medieval and Revolutionary history as they walk through it.

The Conciergerie shares its complex on Île de la Cité with Sainte-Chapelle, and a combined ticket covering both is available and worth considering if you plan to see one — the two are only a short walk apart and pair naturally into a single visit. Sainte-Chapelle in particular draws long queues in high season, so booking the combined ticket online in advance is worth doing either way.