Columbia subject headings:
Harvard subject headings:
Cologne (Germany)--Buildings, structures, etc.
Heine, Heinrich, 1797-1856--Homes and haunts--France--Paris.
Hülfsverein für den Kölner Dombau.
Kölner Dom.--History--19th century.
Nationalism and architecture--Germany--History--19th century.
Princeton subject headings:
Heine, Heinrich, 1797-1856--Homes and haunts--France--Paris.
Hülfsverein für den Kölner Dombau.
Kölner Dom--History--19th century.