Henri Grégoire, often known as Abbé Grégoire, was a French Catholic priest and a leading figure during the French Revolution. He was a fervent abolitionist who tirelessly advocated for the rights of French Jews and enslaved black people, playing a key role in the abolition of slavery. As a member of the National Convention, he supported the establishment of the French First Republic but was a notable opponent of the execution of King Louis XVI. Grégoire also championed the preservation of France's cultural heritage, contributing to the foundation of institutions like the national library and the conservatory of arts and crafts.