Columbia subject headings:
Architecture, Medieval--Latin Orient.
Architecture, Medieval--Middle East.
Castles--Latin Orient.
Castles--Middle East.
Cities and towns, Medieval--Latin Orient.
Cities and towns, Medieval--Middle East.
Crusades.
Latin Orient--Antiquities.
Middle East--Antiquities.
Harvard subject headings:
Architecture, Medieval--Middle East.
Castles--Middle East.
Cities and towns, Medieval--Middle East.
Crusades.
Fortification--Middle East.
Middle East--Antiquities
Princeton subject headings:
Architecture, Medieval--Latin Orient.
Castles--Latin Orient.
Cities and towns, Medieval--Latin Orient.
Crusades--History.
Middle East--Antiquities.