Columbia subject headings:
Harvard subject headings:
Catholic Church--Foreign relations--Flanders.
Flanders--Foreign relations--Catholic Church.
Thirty Years' War, 1618-1648
Princeton subject headings:
Cardinals--Italy--Correspondence.
Catholic Church--Foreign relations--Flanders.
Flanders--Foreign relations--Catholic Church.
Guidi di Bagno, Giovanni Francesco, 1578-1641.
Papal nuncios--Correspondence.
Thirty Years' War, 1618-1648.