Right next to the Palais de Justice and the Sainte-Chapelle, the Conciergerie is an architectural marvel dating back to the Middle Ages. The place is best known for being a prison during the French Revolution, with Marie-Antoinette as its most famous prisoner. You can even visit her cell today. Opt for the Histopad during your tour of the Conciergerie to go back in time thanks to augmented reality or simply appreciate the Salle des Gens d’Armes, Europe’s largest remaining medieval space. Purchase the combined Conciergerie + Sainte-Chapelle ticket online to visit both monuments and save time by avoiding the line.