High Quality Content by WIKIPEDIA articles! Peter of Bruys (also known as Pierre De Bruys or Peter de Bruis; fl. 1117 – c.1131) was a French heresiarch who taught doctrines that were in opposition to the Roman Catholic Church`s beliefs. An angry mob killed him in or around the year 1131. Information concerning Peter of Bruys is derived from two extant sources, the treatise of Peter the Venerable against his followers and from a passage written by Peter Abelard.