Columbia subject headings:
Architecture--Italy--Pompeii (Extinct city)
Pompeii (Extinct city)--Buildings, structures, etc.
Harvard subject headings:
Architecture--Italy--Pompeii (Extinct city)
Pompeii (Extinct city)--Buildings, structures, etc.
Princeton subject headings:
Architecture--Italy--Pompeii (Extinct City).
Pompeii (Extinct city)--Buildings, structures, etc.