Columbia subject headings:
Puglia (Italy)--Buildings, structures, etc.
Harvard subject headings:
Architecture--Italy--Puglia--History--Catalogs.
Architecture--Italy--Puglia.
Triangulation--Italy--Puglia--History--19th century.
Princeton subject headings:
Architecture--Italy--Puglia--19th century--Catalogs.
Catalogs.
Triangulation--Italy--Puglia--History--19th century.