Château d'If
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The Château d'If is located in the Bay of Marseille. It was built in 1524 as a defense against attacks from the sea. However, through the ages it was used as a feared prison for political and religious detainees. Famous people imprisoned there included the Count of Monte Cristo and Abbé Faria.

The original article can be found at: http://en.wikipedia.org/wiki/Château_d'If.
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