During the Fete de la Federation, this man who was then the Bishop of Auten took an oath to the as-yet unwritten constitution.  
During the Fete de la Federation, this man who was then the Bishop of Auten took an oath to the as-yet unwritten constitution.  Rumored to have been privy to the kidnapping and execution of the Duke of Enghien, this man proposed a namesake partition plan for Belgium.  He once hired actors to portray senators in the hopes that he would be named head of a provisional government after the downfall of Napoleon.  His country's lead delegate at the Congress of Vienna and the demander of a quarter million dollar bribe during the XYZ affair, for 10 points, name this French diplomat.
During the Fete de la Federation, this man who was then the Bishop of Auten took an oath to the as-yet unwritten constitution.  
Charles Maurice de {Talleyrand}-Perigord