Columbia subject headings:
Architecture--France--Auvergne--History--19th century.
Architecture--France--Auvergne.
Viollet-le-Duc, Eugène-Emmanuel, 1814-1879--Exhibitions.
Harvard subject headings:
Architecture--France--Auvergne--Exhibitions.
Cathédrale de Clermont-Ferrand.
Viollet-le-Duc, Eugène-Emmanuel, 1814-1879--Exhibitions.
Princeton subject headings:
Architecture, Modern--19th century--France--Auvergne (Region).
Architecture--France--Auvergne (Region).
Viollet-le-Duc, Eugène-Emmanuel, 1814-1879--Exhibitions.