Armand Jean du Plessis,
Cardinal et Duc de Richelieu (9 September 1585 - 4 December 1642) was a French clergyman, noble, and statesman.
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- Savoir dissimuler est le savoir des rois.
- Translation: Deception is the knowledge of kings.
- “Maxims,” Testament Politique (1641)
- Secrecy is the first essential in affairs of state.
- “Maxims,” Testament Politique (1641)