Columbia subject headings:
Nobility--Europe, Central--History--16th century--Congresses.
Nobility--Europe, Central--History--17th century--Congresses.
Reformation--Europe, Central--Congresses.
Harvard subject headings:
Nobility--Germany--History--16th century--Congresses.
Nobility--Germany--History--17th century--Congresses.
Reformation--Congresses
Princeton subject headings:
Nobility--Germany--History--16th century--Congresses.
Nobility--Germany--History--17th century--Congresses.
Reformation--Congresses.