Linen Backed litho hand colored 

Pope Leo XIII (Italian: Leone XIII; born Vincenzo Gioacchino Raffaele Luigi Pecci; 2 March 1810 – 20 July 1903, to an Italian comital family) reigned as Pope from 20 February 1878 to his death. He was the oldest pope (reigning until the age of 93), and had the third longest confirmed pontificate, behind that of Pius IX (his immediate predecessor) and John Paul II. He is the most recent pontiff to date to take the pontifical name of "Leo" upon being elected to the pontificate.

He is well known for his intellectualism and his attempts to define the position of the Catholic Church with regard to modern thinking. In his famous 1891 encyclical Rerum novarum  , Pope Leo outlined the rights of workers to a fair wage, safe working conditions, and the formation of labor unions, while affirming the rights of property and free enterprise, opposing both Atheistic Marxism and laissez-faire capitalism.   from WIkipedia much more there re. Pope Leo XIII