For the 20th-century Belgian Byzantinologist, see Henri Grégoire (historian).Henri Jean-Baptiste Grégoire (French: [?~?i g?egwa?]; 4 December 1750 – 28 May 1831), often referred to as Abbé Grégoire, was a French Roman Catholic priest, constitutional bishop of Blois and a revolutionary leader.
He was an ardent abolitionist of human slavery and supporter of universal suffrage.
He was a founding member of the Bureau des longitudes, the Institut de France, and the Conservatoire national des arts et métiers.