"le duc de Richelieu"
could refer to any of the eight dukes of Richelieu;
probably not Armand-Jean 'le cardinal de Richelieu', and probably not the notorious 3rd duke, 'le maréchal de Richelieu'
Maybe the 5th duke, founder of Odessa and twice Prime Minister of France who succeeded Tallyrand?
Perhaps the owners will enlighten us...
tel: 01 43 43 05 64
A short promenade to the east from the Île St. Louis