Bartolo Longo was an Italian lawyer who has been beatified by the Catholic Church. He presented himself as a former "Satanic priest" who returned to the Catholic faith and became a Dominican tertiary, dedicating his life to the rosary and the Virgin Mary. He was eventually awarded a papal knighthood of the Equestrian Order of the Holy Sepulchre of Jerusalem.

The Third Order of Saint Dominic, also referred to as the Lay Fraternities of Saint Dominic or Lay Dominicans since 1972, is a Catholic third order which is part of the Dominican Order.