Pope Leo XIII (Italian: Leone XIII), born Vincenzo Gioacchino Raffaele Luigi Pecci to an Italian comital family, reigned as Pope from 20 February 1878 to his death in 1903. He was the oldest pope (reigning until the age of 93), and had the third longest pontificate, behind that of Pope Pius IX (his immediate predecessor) and John Paul II. He was the most recent pontiff to date to take the pontifical name of "Leo" upon being elected to the pontificate until 2025. He is well known for his intellectualism, the development of social teachings with his famous papal encyclical [Book: Rerum novarum] and his attempts to define the position of the Catholic Church with regard to modern thinking. He influenced Roman Catholic Mariology and promoted both the rosary and the scapular. Leo XIII issued a record of eleven Papal encyclicals on the rosary earning him the title as the "Rosary Pope". In addition, he approved two new Marian scapulars and was the first pope to fully embrace the concept of Mary as Mediatrix. He was the first pope to never have held any control over the Papal States, after they were dissolved by 1870. He was briefly buried in the grottos of Saint Peter's Basilica before his remains were later transferred to the Basilica of Saint John Lateran.