Columbia subject headings:
Architecture, Modern--19th century--Exhibitions.
Hospital buildings--Design and construction--Exhibitions.
Hospitals--France--Paris--Exhibitions.
Harvard subject headings:
Architecture, Modern--19th century--France--Paris.
Architecture--France--Paris
Hospitals--France--Paris--Design and construction--History--19th century.
Paris (France)--Buildings, structures, etc.
Princeton subject headings:
Hospitals--France--Paris--Designs and construction--History--19th century--Exhibitions.
Paris (France)--Buildings, structures, etc.--Exhibitions.