Bartolo Longo
Blessed Bartolo Longo (February 10, 1841 – October 5, 1926) was a Satanist priest who later repented and became a lay Dominican, dedicating his life to the Virgin Mary. He was eventually awarded a papal knighthood.
Read more about Bartolo Longo: Early Years, Conversion, Shrine of Our Lady of Pompei, Later Life and Death, Beatification