Columbia subject headings:
Architecture--France--Paris--History--19th century.
Architecture--France--Paris--History--20th century.
City planning--France--Paris--History--19th century.
City planning--France--Paris--History--20th century.
Fortification--France--Paris--History--19th century.
Fortification--France--Paris--History--20th century.
Harvard subject headings:
Architecture, Modern--19th century--France--Paris.
Architecture, Modern--20th century--France--Paris.
Architecture--France--Paris--History--19th century
Architecture--France--Paris--History--20th century
City planning--France--Paris--History--19th century.
City planning--France--Paris--History--20th century.
Fortification--France--Paris--History--19th century.
Fortification--France--Paris--History--20th century.
Princeton subject headings:
Architecture and society--France--Paris--Exhibitions.
Architecture, Modern--France--Paris--Exhibitions.
City planning--France--Paris--Exhibitions.
Fortification--France--Paris--History--Exhibitions.
Paris (France)--Buildings, structures, etc.--Exhibitions.
Urbanization--France--Paris--Exhibitions.