Pedro de Arbués, also known as Peter of Arbués was a Spanish Roman Catholic priest and a professed Augustinian canon. He served as an official of the Spanish Inquisition until he was assassinated in the La Seo Cathedral in Zaragoza in 1485 by Jews and conversos. The veneration of him came swiftly through popular acclaim. His death greatly assisted the Inquisitor-General Tomás de Torquemada's campaign against heretics and crypto-Jews. His canonization was celebrated on 29 June 1867.