Pope Leo XIII
E19800
Pope Leo XIII was the head of the Catholic Church from 1878 to 1903, known for his influential social encyclical *Rerum Novarum* and his strong promotion of Marian devotion and the Rosary.
E19800
Pope Leo XIII was the head of the Catholic Church from 1878 to 1903, known for his influential social encyclical *Rerum Novarum* and his strong promotion of Marian devotion and the Rosary.