It is built as a part of the second wall of Cairo at the age of the caliph Al-MostanserBellah by his minister, leader of the armies, the Armenian Badre Al-Jamaly in 480 H\ 1078 AD, whom the caliph brought after Al-Mostanserya crisis to control it, and he actually did it and killed the heads of the turmoil and improved the condition of the country. He became then the first of the great ministers in the Fatimid caliphate.
The Gate consists of two massive towers reaching the wall height, and a bent semi-circular façade. The entrance of the Gate is surmounted by holes to pour boiling liquids over the attackers (machicolations). The upper floor consists of two rooms for watching and through them there are holes for throwing arrows (barbicans) when the country is sieged; the upper roof of the towers is crowned with crenellations.
At the eastern corner of the entrance vestibule, there is a little mausoleum known by Hasan El-Zouk mausoleum, the public said that he was a sheik got boring from what happens between the alleys guards and decided to get out from Cairo but he died while he was leaving under the Gate, therefore a mausoleum was built for him.