This is a floor plan of the Citadel which is a medieval Fortress in Cairo Egypt. It's very beginning was in the year 810 and it was first built
Into a fortress between 1176 and 1183 by Saladin. There is a key at the bottom right of the picture showing the growth and various developments
over the centuries by color code. I also have pictures and more information about this fortress here: About The Citadel

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Floor Plan of the Citadel