Columbia subject headings:
Harvard subject headings:
Ambassadors--History--16th century.
Ambassadors--History--17th century.
Audiences--Europe--History--Congresses.
Cultural relations--History--Congresses.
Diplomatic etiquette--History.
Europe--Relations--Congresses.
Intercultural communication--History.
Political customs and rites--History--16th century.
Political customs and rites--History--17th century.
Political customs and rites--History--Congresses.
Rites and ceremonies--History--Congresses.
Princeton subject headings:
Ambassadors--History--16th century.
Ambassadors--History--17th century.
Diplomatic etiquette--History.
Intercultural communication--History.
Political customs and rites--History--16th century.
Political customs and rites--History--17th century.