Columbia subject headings:
Architecture, Medieval--Germany--Franconia--Guidebooks.
Castles--Germany--Franconia--Guidebooks.
City walls--Germany--Franconia--Guidebooks.
Fortification--Germany--Franconia--Guidebooks.
Fortress-churches--Germany--Franconia--Guidebooks.
Franconia (Germany)--Buildings, structures, etc.--Guidebooks.
Harvard subject headings:
Architecture, Medieval--Germany--Franconia--Guidebooks.
Castles--Germany--Franconia--Guidebooks.
City walls--Germany--Franconia--Guidebooks.
Fortification--Germany--Franconia--Guidebooks.
Fortress-churches--Germany--Franconia--Guidebooks.
Franconia (Germany)--Buildings, structures, etc.--Guidebooks.
Princeton subject headings:
Architecture, Medieval--Germany--Franconia--Guidebooks.
Castles--Germany--Franconia--Guidebooks.
City walls--Germany--Franconia--Guidebooks.
Fortification--Germany--Franconia--Guidebooks.
Fortress-churches--Germany--Franconia--Guidebooks.
Franconia (Germany)--Buildings, structures, etc.--Guidebooks.
Guidebooks.