The Conciergerie

Paris – The Conciergerie

"Located in the heart of Paris, on the banks of the Seine, the Conciergerie is one of the oldest remains of the Palais de la Cité, residence and seat of power of the kings of France in the Middle Ages.

Transformed into a prison for the Parliament of Paris towards the end of the 14th century, the Conciergerie remained a major place of detention during the French Revolution with the installation of the Revolutionary Court. Its most famous prisoner was Marie-Antoinette. A commemorative chapel was built during the 19th century Restoration period on the site of her cell and is part of the tour."

https://www.paris-conciergerie.fr/en/discover/history-of-the-conciergerie