Columbia subject headings:
Architecture, Medieval--Germany--Saxony.
City walls--Germany--Saxony.
Fortification--Germany--Saxony.
Gates--Germany--Saxony.
Military architecture--Germany--Saxony.
Towers--Germany--Saxony.
Harvard subject headings:
Architecture, Medieval--Germany--Saxony.
City walls--Germany--Saxony.
Fortification--Germany--Saxony.
Gates--Germany--Saxony.
Military architecture--Germany--Saxony.
Towers--Germany--Saxony.
Princeton subject headings: