Columbia subject headings:
Catholic Church--Foreign relations--Spain.
Italy--Foreign relations--Spain.
Spain--Foreign relations--Catholic Church.
Spain--Foreign relations--Italy.
Harvard subject headings:
Catholic Church--Foreign relations--Spain.
Italy--Foreign relations--Spain.
Spain--Foreign relations--Catholic Church.
Spain--Foreign relations--Italy.
Princeton subject headings:
Catholic Church--Foreign relations--Spain.
Italy--Foreign relations--Spain.
Spain--Foreign relations--Catholic Church.
Spain--Foreign relations--Italy.