Columbia subject headings:
Castles--France--Alsace--History--To 1500--Dictionaries.
Fortification--France--Alsace--History--To 1500--Dictionaries.
Military architecture--France--Alsace--History--To 1500--Dictionaries.
Harvard subject headings:
Castles--France--Alsace--History--To 1500--Dictionaries.
Fortification--France--Alsace--History--To 1500--Dictionaries.
Military architecture--France--Alsace--History--To 1500--Dictionaries.
Princeton subject headings: