Columbia subject headings:
Harvard subject headings:
Aristocracy (Social class)--Austria--History--To 1500--Congresses.
Aristocracy (Social class)--Germany--History--To 1500--Congresses.
Austria--History--To 1500--Congresses.
Constitutional history--Austria--Congresses.
Constitutional history--Germany--Congresses.
Germany--History--To 1500--Congresses.
Nobility--Austria--History--To 1500--Congresses.
Nobility--Germany--History--To 1500--Congresses.
Princeton subject headings:
Aristocracy (Social class)--Austria--History--To 1500--Congresses.
Aristocracy (Social class)--Germany--History--To 1500--Congresses.
Austria--History--To 1500--Congresses.
Constitutional history--Austria--Congresses.
Constitutional history--Germany--Congresses.
Germany--History--To 1500--Congresses.
Nobility--Austria--History--To 1500--Congresses.
Nobility--Germany--History--To 1500--Congresses.