Columbia subject headings:
Belgium--Foreign relations--Catholic Church.
Benedict XV, Pope, 1854-1922.
Catholic Church--Foreign relations--Belgium.
World War, 1914-1918--Diplomatic history.
Harvard subject headings:
Belgium--Foreign relations--Catholic Church.
Benedict XV, Pope, 1854-1922
Catholic Church--Foreign relations--Belgium.
Neutrality--Belgium.
World War, 1914-1918--Diplomatic history
Princeton subject headings:
Belgium--Foreign relations--Catholic Church.
Benedict XV, Pope, 1854-1922.
Catholic Church--Foreign relations--Belgium.
Neutrality--Belgium.
World War, 1914-1918--Diplomatic history.