Cairo was called the citadel or forte, i.e.
stronghold. It looked like a square; 1200m2 in length and 1100m2 in width. It
was surrounded with El-Bahr El Azim (the great sea) from the east, the gulf
from the west, from the north gardens extended to Mataria and the mount Gabal
El-Guishi from the south.
When the Fatimid reign (969-1171) settled in Cairo
under the leadership of El Mo'ez Li-Dinellah it was called "Cairo of El-Mo'ez"
because they decorated its four suburbs with luxurious buildings, delightful
spots and gardens. This increased its delightfulness and beauty. It was the
settlement of rulers and princes.
El-Fustat city was big and important due to plenty of
buildings, many people and much of livelihood means that is why Jawhar Al-Siqilly
was so keen on it. He established the fortified gates (Bab) and installed them
around it in the four-sided wall. He built El-Qantara at Bab El-Shairia Street.
He also built a wall to quickly surround the Palace. But this was destroyed
Source: State Information Service