Columbia subject headings:
Cairo (Egypt)--Antiquities.
Gates--Egypt--Cairo.
Historic buildings--Egypt--Cairo.
Harvard subject headings:
City walls--Egypt--Cairo.
Gates--Egypt--Cairo.
Gateways--Egypt--Cairo.
Islamic antiquities--Egypt--Cairo.
Princeton subject headings:
City walls--Egypt--Cairo.
Gates--Egypt--Cairo.
Gateways--Egypt--Cairo.
Islamic antiquities--Egypt--Cairo.