Pope Leo XIII is known for intellectualism, the development of social teachings with his encyclical Rerum Novarum and his attempts to define the position of the Church with regard to modern thinking. He influenced Roman Catholic Mariology and promoted both the rosary and the scapular. He issued a record eleven encyclicals on therosary, approved two new Marian scapulars and was the first Pope to fully embrace the concept of Mary asmediatrix. Pope Leo XIII (2 March 1810 – 20 July 1903), born Vincenzo Gioacchino Raffaele Luigi Pecci to an Italian comital family, was the 256th Pope of the Catholic Church, reigning from 1878 to 1903. He was the oldest pope (reigning until the age of 93), and had the third longest pontificate, behind Pius IX (his immediate predecessor) and John Paul II.
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