Henri Coiffier de Ruzé, Marquis of Cinq-Mars, French conspirator (b. 1620)

Henri Coiffier de Ruzé, Marquis of Cinq-Mars (1620 – 12 September 1642) was a favourite of King Louis XIII of France, who led the last and most nearly successful of many conspiracies against the Cardinal Richelieu, the king's powerful first minister.