Henri Coiffier de Ruzé, Marquis of Cinq-Mars

Henri Coiffier de Ruzé d'Effiat, Marquis of Cinq-Mars (French pronunciation: [ɑ̃ʁi kwafje ʁyze]; 27 March 1620 - 12 September 1642) was a favourite of King Louis XIII, who led the last and most nearly successful of many conspiracies against the Cardinal Richelieu, the king's powerful first minister.