"the Duc de Vincennes (old Armand, of course, not Philippe) challenged me to a duel"
Château de Vincennes, Paris
Creative Commons Attribution Share AlikeChâteau de Vincennes, Paris - Credit: Matt Perdeaux, Flickr

Although there is a Château de Vincennes in what is now a Paris suburb, there does not appear to have been a Duc de Vincennes.

At different points in its history, the château has been (amongst other things) a royal hunting lodge, a porcelain factory and a prison.