Columbia subject headings:
Architecture--Italy--Pictorial works--Catalogs.
Biblioteca apostolica vaticana--Photograph collections--Catalogs.
Italy--History--19th century--Pictorial works--Catalogs.
Harvard subject headings:
Architecture--Italy--Pictorial works--Catalogs.
Biblioteca apostolica vaticana--Photograph collections--Catalogs.
Italy--History--19th century--Pictorial works--Catalogs.
Princeton subject headings:
Architecture--Italy--Pictorial works--Catalogs.
Biblioteca apostolica vaticana--Photograph collections--Catalogs.
Catalogs.
Italy--History--19th century--Pictorial works--Catalogs.