Columbia subject headings:
Land tenure--Europe, Central--18th century--Congresses.
Land tenure--Europe, Central--19th century--Congresses.
Nobility--Europe, Central--Economic conditions--18th century--Congresses.
Nobility--Europe, Central--Economic conditions--19th century--Congresses.
Harvard subject headings:
Aristocracy (Social class)--Europe, Central--History--Congresses.
Europe, Central--Economic conditions--Congresses.
Nobility--Europe, Central--Economic conditions--Congresses.
Princeton subject headings:
Land tenure--Europe, Central--18th century--Congresses.
Land tenure--Europe, Central--19th century--Congresses.
Nobility--Europe, Central--Economic conditions--18th century--Congresses.
Nobility--Europe, Central--Economic conditions--19th century--Congresses.