Charles-Maurice de Talleyrand-Périgord, 1st Prince of Benevento, then Prince of Talleyrand, was a French secularized clergyman, statesman, and leading diplomat. After studying theology, he became Agent-General of the Clergy in 1780. In 1789, just before the French Revolution, he became Bishop of Autun. He worked at the highest levels of successive French governments, most commonly as foreign minister or in some other diplomatic capacity. He served as the French representative to the Congress of Vienna. His career spanned the regimes of Louis XVI, the years of the French Revolution, Napoleon, Louis XVIII, Charles X, and Louis Philippe I. Those Talleyrand served often distrusted him but found him extremely useful. The name "Talleyrand" has become a byword for crafty and cynical diplomacy.
Talleyrand was Napoleon's chief diplomat during the years when French military victories brought one European state after another under French hegemony. Most of the time, he worked for peace so as to consolidate France's gains. He succeeded in obtaining peace with Austria through the 1801 Treaty of Lunéville and with Britain in the 1802 Treaty of Amiens.