Columbia subject headings:
Architectural drawing--Italy--Piacenza--18th century--Exhibitions.
Architectural drawing--Italy--Piacenza--19th century--Exhibitions.
Mansions--Italy--Piacenza--Exhibitions.
Piacenza (Italy)--Buildings, structures, etc.--Exhibitions.
Harvard subject headings:
Princeton subject headings:
Architectural drawing--Italy--Catalogs.
Architecture, Domestic--Designs and plans--Italy--Catalogs.
Archivio di Stato di Piacenza.