St. Pedro de Arbués, also known as Peter of Arbués (†1485), was a Spanish Roman Catholic priest and a professed Augustinian canon who served as an official of the Spanish Inquisition until he was assassinated in the La Seo Cathedral in Zaragoza in 1485 allegedly 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. Pope Alexander VII beatified Pedro de Arbués in Rome on 20 April 1664. He was canonized by Pope Pius IX on 29 June 1867 among protests from Jews and Christians.