Columbia subject headings:
Architectural photography--History--19th century.
Museum Folkwang Essen. Fotografische Sammlung.
Harvard subject headings:
Architectural photography--History--19th century.
Museum Folkwang Essen. Fotografische Sammlung.
Princeton subject headings:
Architectural photography--History--19th century.
Museum Folkwang Essen. Fotografische Sammlung--Catalogs.