Original: Pope Leo XIII (2 March 1810 - 20 July 1903), born Count Vincenzo Gioacchino Raffaele Luigi Pecci, was the 257th Pope of the Roman Catholic Church, reigning from 1878 to 1903, succeeding Pope Pius IX.
Simplified: Pope Leo XIII (March 2, 1810—July 20, 1903), born Vincenzo Gioacchino Raffaele Luigi Pecci, was the 256th Pope of the Roman Catholic Church.