Columbia subject headings:
Benedict XV, Pope, 1854-1922.
Catholic Church--Foreign relations.
Catholic Church--History--20th century.
Popes--Biography.
World War, 1914-1918--Peace.
World War, 1914-1918--Religious aspects--Catholic Church.
Harvard subject headings:
Benedict XV, Pope, 1854-1922
Catholic Church--Foreign relations.
Catholic Church--History--20th century.
Popes--Biography
World War, 1914-1918--Peace
World War, 1914-1918--Religious aspects--Catholic Church
Princeton subject headings: