Columbia subject headings:
Catholic Church--Europe--History--20th century--Congresses.
Catholic Church--Foreign relations--20th century--Congresses.
Catholic Church--Foreign relations--Germany--Congresses.
Catholic Church. Curia Romana--History--20th century--Congresses.
Church and state--Europe--History--20th century--Congresses.
Germany--Foreign relations--Catholic Church--Congresses.
Papacy--History--20th century--Congresses.
Papal nuncios--Europe--History--Congresses.
Papal nuncios--Germany--History--Congresses.
Pius XII, Pope, 1876-1958--Congresses.
Harvard subject headings:
Catholic Church--Europe--History--20th century--Congresses.
Catholic Church--Foreign relations--Germany--Congresses.
Catholic Church. Curia Romana--History--20th century.
Church and state--Europe--History--20th century--Congresses.
Germany--Foreign relations--Catholic Church--Congresses.
Papacy--History--20th century--Congresses.
Papal nuncios--Europe--History--Congresses.
Papal nuncios--Germany--History--Congresses.
Pius XII, Pope, 1876-1958--Congresses.
Princeton subject headings:
Catholic Church--Europe--History--20th century--Congresses.
Catholic Church--Foreign relations--Germany--Congresses.
Catholic Church. Curia Romana--History--20th century.
Church and state--Europe--History--20th century--Congresses.
Germany--Foreign relations--Catholic Church--Congresses.
Papacy--History--20th century--Congresses.
Papal nuncios--Europe--History--Congresses.
Papal nuncios--Germany--History--Congresses.
Pius XII, Pope, 1876-1958--Congresses.