""A History of the Papacy from the Great Schism to the Sack of Rome V4"" is a comprehensive account of the papacy from the 14th to the 16th century, written by Mandell Creighton. The book covers the period of the Great Schism, which saw the division of the Catholic Church into two rival factions, and the subsequent efforts to reunite the church. It also examines the papacy's role in the political and cultural developments of the time, including the...