Columbia subject headings:
Germany--Politics and government--1517-1648.
Holy Roman Empire--History--1517-1648.
Knights and knighthood--Germany--History--16th century.
Knights and knighthood--Germany--History--17th century.
Nobility--Germany--History--16th century.
Nobility--Germany--History--17th century.
Social classes--Germany--History.
Harvard subject headings:
Land tenure--Germany--History
Nobility--Germany--History.
Princeton subject headings:
Germany--Politics and government--1517-1648.
Holy Roman Empire--History--1517-1648.
Knights and knighthood--Germany--History--16th century.
Knights and knighthood--Germany--History--17th century.
Nobility--Germany--History--16th century.
Nobility--Germany--History--17th century.
Social classes--Germany--History.