Columbia subject headings:
Harvard subject headings:
Europe--Court and courtiers--History--Congresses.
Princes--Dwellings--Austria--Salzburg--History--Congresses.
Princes--Dwellings--Europe--History--Congresses.
Princes--Homes and haunts--Austria--Salzburg--History--Congresses.
Princes--Homes and haunts--Europe--History--Congresses.
Salzburg (Austria)--Court and courtiers--History--Congresses.
Princeton subject headings:
Europe--Court and courtiers--Congresses.
Europe--Kings and rulers--Congresses.
Royal households--Austria--Salzburg--Congresses.
Royal households--Europe--Congresses.
Salzburg (Austria)--Court and courtiers--Congresses.
Salzburg (Austria)--Kings and rulers--Congresses.