The story of St. Bartolo Longo is perhaps the most dramatic conversion story in the history of the Catholic Church, and it is the Rosary that made it possible.
Bartolo Longo was born on February 10, 1841, in Latiano, in southern Italy, to a devout Catholic family. As a young man studying law at the University of Naples, he fell under the influence of anti-Catholic intellectuals and spiritists. He abandoned the faith of his childhood entirely. Drawn deeper and deeper into the occult, Longo became a satanic priest, ordained in a ceremony dedicated to the worship of the devil. He participated in seances, conducted satanic rituals, and publicly mocked the Catholic Church. By his own later testimony, he believed he was doing the work of Satan and was proud of it.
The effects on his health were devastating. Longo suffered severe physical and psychological deterioration. He experienced hallucinations, fits of rage, and a deep interior darkness that nothing could relieve. A concerned friend eventually introduced him to a Dominican priest, Father Alberto Radente, who began the slow process of drawing Longo back to the Catholic faith.
The turning point came through the Rosary.
Father Radente urged Longo to pray the Rosary daily. Longo resisted at first, but eventually consented. As he began praying the beads, something within him shifted. The darkness that had consumed his interior life began to lift. He later described hearing an interior voice during a moment of deep despair: “If you seek salvation, spread the Rosary. This is Mary’s own promise.” He took those words to heart with a totality that would reshape the rest of his life.
Longo settled in the Valley of Pompeii, the ancient city buried by Vesuvius, where he found a population steeped in superstition and largely abandoned by the institutional Church. He began teaching the Rosary to the local people. He obtained a dilapidated painting of Our Lady of the Rosary, had it restored, and enshrined it in a small chapel. Around that image, he built what would become the Pontifical Shrine of Our Lady of the Rosary of Pompeii, one of the most visited Marian sanctuaries in the world.
Longo dedicated the rest of his life to the Rosary and to charity. He founded orphanages for the children of prisoners, established schools, and wrote extensively about the Rosary. He composed the famous “Supplica alla Madonna di Pompei” (Supplication to Our Lady of Pompeii), a prayer that is recited publicly twice a year at the shrine by hundreds of thousands of the faithful.
Pope John Paul II called Bartolo Longo “the Apostle of the Rosary” and beatified him on October 26, 1980. On October 19, 2025, Pope Leo XIV canonized him as a saint of the Catholic Church before an estimated 70,000 people in St. Peter’s Square.
The life of St. Bartolo Longo is proof that no soul is beyond the reach of the Rosary. A man who had been ordained a priest of Satan became, through the beads of the Blessed Mother, one of the greatest saints of the modern age.
Sources: The Dominican Friars (dominicanfriars.org), “A former Satanist priest who became a Saint”; the Coming Home Network (chnetwork.org), “From Satanist to Saint: The Story of Bartolo Longo”; Wikipedia entry on Bartolo Longo; Vatican News coverage of the canonization, October 19, 2025; the National Catholic Reporter, October 19, 2025.