The Holy Inquisition was established by the Catholic Monarchs in the XV century for the purpose of exposing the "
Marranos", this is, the secret infiltrated Jєωs, who pretended to be Christian but remained at heart an obstinate enemy of Christ. There are still plenty of those around in the guise of Catholics occupying ecclesiastical offices of high power.
Great Catholic Queen Isabella of Spain (who my avatar is of) petitioned Pope Sixtus IV to authorize the establishment of such a Holy Tribunal and although she has not been canonized yet, Saint Peter Arbues, who was a notable inquisitor, has been indeed. He was canonized by Pius IX, in 1867. Unfortunately, he was murdered by the Jєωs because he was notably good at finding the
Marranos.
On September 17, the Church celebrates St. Peter Arbues.
From the Roman Martyrology:
“At Saragossa in Spain, of Saint Peter Arbues, first Inquisitor of the Faith in the Kingdom of Aragon, who was cruelly butchered by relapsed Jєωs for the sake of that Catholic Faith which he had so zealously protected by virtue of his office. Pope Pius IX added him to the list of martyr saints.”
St. Peter Arbues, ora pro nobis!