Peter of Bruys (also known as Pierre De Bruys or Peter de Bruis; fl. 1117 – c.1131) was a medieval French proto-Protestant reformer and teacher. He was called a heresiarch and was deprived of his office by the Roman Catholic Church for opposing infant baptism, the erecting of churches and the veneration of crosses, the doctrine of transubstantiation and prayers for the dead. An angry Roman Catholic mob murdered him in or around 1131. His followers became known as Petrobrusians.
