Columbia subject headings:
Catholic Church--Foreign relations--Sources.
Church history--Modern period, 1500-
Papal legates.
Papal nuncios.
Harvard subject headings:
Catholic Church--Foreign relations--Sources.
Church history--Modern period, 1500-
Papal legates
Papal nuncios
Princeton subject headings:
Catholic Church--Foreign relations--Sources.
Church history--Modern period, 1500-
Papal legates.
Papal nuncios.