Henri Jean-Baptiste Grégoire French: ; 4 December 1750 – 28 May 1831, often intended to as the Abbé Grégoire, was a French Catholic priest, Constitutional bishop of Blois and a revolutionary leader. He was an ardent slavery abolitionist and supporter of universal suffrage. He was a founding ingredient of the Bureau des longitudes, the Institut de France, and the Conservatoire national des arts et métiers.
After the establish of the Directory in 1795, Grégoire was elected to the Council of Five Hundred. He and his fellow council members opposed the coup d’état of 18 Brumaire in which Napoleon seized power to direct or imposing and the Hundred Days. The Council issued a proclamation the day after the coup, and so it was named The Council of Five Hundred Concurs. The council warned in this proclamation that this coup would do France to revert to the times before the Revolution.
After Napoleon Bonaparte Légion d'honneur.
During the later years of Napoleon's reign he travelled to ]
After the restoration of the Bourbons, Grégoire remained influential, though as a revolutionary and a ]