Columbia subject headings:
Harvard subject headings:
Architecture--Belgium--Charleroi.
Architecture--Belgium--Mons.
Architecture--France--Valenciennes.
Charleroi (Belgium)--Buildings, structure, etc.
Charleroi (Belgium)--Buildings, structures, etc.
Charleroi (Belgium)--History.
Mons (Belgium)--Buildings, structures, etc.
Mons (Belgium)--History.
Valenciennes (France)--Buildings, structures, etc.
Valenciennes (France)--History.
Princeton subject headings:
Architecture--Belgium--Charleroi.
Architecture--Belgium--Mons.
Architecture--France--Valenciennes.
Charleroi (Belgium)--Buildings, structures, etc.
Mons (Belgium)--Buildings, structures, etc.
Valenciennes (France)--Buildings, structures, etc.