Columbia subject headings:
Fortification--France--Metz--Exhibitions.
Metz (France)--Antiquities--Exhibitions.
Metz (France)--Buildings, structures, etc.--Exhibitions.
Military architecture--France--Metz--Exhibitions.
Harvard subject headings:
Fortification--France--Metz--Exhibitions.
Metz (France)--Antiquities.
Metz (France)--Buildings, structures, etc.--Exhibitions.
Metz (France)--History--Exhibitions.
Military architecture--France--Metz--Exhibitions.
Princeton subject headings:
Fortification--France--Metz--Exhibitions.
Metz (France)--Antiquities--Exhibitions.
Metz (France)--Buildings, structures, etc.--Exhibitions.
Military architecture--France--Metz--Exhibitions.