Château D'If Fortress On The Island Of If, Frioul Archipelago, Bay Of Marseille, Mediterranean Sea, France

As was common practice in those days, prisoners were treated differently according to their class and wealth. The poorest were literally placed at the bottom, being confined to a windowless dungeon under the castle. The wealthiest were much better off, living comparatively comfortably in their own private cells (or pistoles) higher up, with windows, a garderobe and a fireplace. However, they were expected to pay for this privilege, effectively forcing them to fund their own incarceration.
The château today
The château's use as a prison ceased at the end of the 19th century. It was demilitarized and opened to the public on September 23, 1890. It can now be reached by boat from Marseille's old port. Its fame as the setting for Dumas' novel has made it a popular tourist destination.