Saint Malachy (1095 – 2 November 1148) an Irish-born Catholic who became Abbot of Bangor, founded the diocese of Armagh as Archbishop of Armagh. His 12th century life saw Ireland under attack from Viking nations and a growing rejection of Christianity. He would lead the Irish church rebirth. Malachy was canonized in 1199 by Pope Clement III.
Malachy had a gift of visions, he has said to have predicted his own death and the location, Clairvaux, France.
Prophecy of the Popes
Benedictine monk Arnold de Wyon claimed to have discovered Malachy's writings lost in Vatican archives for over 400 years. The cryptic Latin writings addressed a vision of future Popes, starting with Pope Celestine II, 112 in all with the last being Peter the Roman and the destruction of Rome just before Judgement day. Arnold de Wyon published the so-called "Doomsday Prophecy" in 1590.
Many historians claim this to be an elaborate fraud, including some Vatican officials. The Vatican has never taken a stance confirming or denying the accuracy of these writings.