Louis-Marie-Olivier Duchesne

Louis-Marie-Olivier Duchesne (born Sept. 13, 1843, Saint-Servan, Fr.—died April 21, 1922, Rome) was a church historian, a leading figure in the 19th- and early 20th-century Roman Catholic revival of learning, who pioneered in the application of archaeological, topographical, liturgical, theological, and social studies to church history. Ordained a priest in 1867, he studied in Rome and in Paris (1871–73), where he was appointed professor at the Catholic Institute (1877–85) and where in 1881 he founded...