A French Protestant theologian, born in Burgundy, of good birth; professor of Greek at Lausanne; deputed from Germany to intercede for the Huguenots in France, persuaded the king of Navarre to favour the Protestants; settled in Geneva, became the friend and successor of Calvin; wrote a book, "De Hereticis a Civili Magistratu Puniendis," in which he justified the burning of Servetus, and a "History of the Reformed Churches" in France; died at 86 (1519-1605).