Columbia subject headings:
Architecture--Conservation and restoration--France--History--19th century.
Bœswillwald, Emile, 1815-1896--Criticism and interpretation.
Harvard subject headings:
Architecture--France--Conservation and restoration--History--19th century.
Bœswillwald, Emile, 1815-1896--Criticism and interpretation.
Princeton subject headings:
Architecture, Medieval--France--Conservation and restoration.
Bœswillwald, Emile, 1815-1896.
Church architecture--France--Conservation and restoration.