Columbia subject headings:
Castles--Middle East--History.
Crusades.
Harvard subject headings:
Architecture, Medieval--Latin Orient
Castles--Latin Orient.
Castles--Middle East--History.
Crusades
Fortification--Latin Orient.
Military history, Medieval
Princeton subject headings:
Architecture, Medieval--Latin Orient.
Castles--Latin Orient.
Crusades.
Fortification--Latin Orient.
Military history, Medieval.