Columbia subject headings:
Architecture, Renaissance--Italy--Piacenza.
Architecture--Italy--Piacenza.
Farnese family.
Harvard subject headings:
Architecture--Italy--Piacenza.
Buildings--Italy--Piacenza.
Mannerism (Architecture)--Italy--Piacenza.
Piacenza (Italy)--Buildings, structures, etc.
Princeton subject headings:
Architecture, Renaissance--Italy--Piacenza.
Architecture--Italy--Piacenza.
Farnese family.