Collection de l'Enfer
The Enfer (; French: [ɑ̃fɛʁ], 'Inferno' or 'Hell') or Collection de l'Enfer is a special department of the Bibliothèque nationale de France in Paris. It is a special collection of books and manuscripts of an erotic or pornographic character which, because of their rarity and value, may be seen only with authorization.