Columbia subject headings:
Buckingham Palace (London, England)
Gardens--England--London--History.
Royal  gardens--England--London--History.
Harvard subject headings:
Buckingham Palace (London, England)
Gardens--England--London--History.
Royal gardens--England--London--History.
Princeton subject headings:
Buckingham Palace (London, England)
Gardens--England--London--History.
Royal gardens--England--London--History.