Columbia subject headings:
Architectural photography--History--19th century--Exhibitions.
Biblioteca Nacional (Spain)--Photograph collections--Exhibitions.
Harvard subject headings:
Architectural photography--History--19th century--Exhibitions.
Biblioteca Nacional (Spain)--Photograph collections--Exhibitions.
Princeton subject headings:
Architectural photography--History--19th century--Exhibitions.
Biblioteca Nacional (Spain)--Photograph collections--Exhibitions.