Columbia subject headings:
Christians--Israel.
Crusades.
Harvard subject headings:
Christians--Palestine--History--To 1500.
Crusades--History.
Jews--History--70-1789.
Palestine--History--638-1917
Palestine--History--70-638
Rome--History--Theodosius I, the Great, 379-395.
Princeton subject headings:
Christians--Israel.
Crusades--History.