English: The Citadel of Salah al-Din al-Ayyubi in Cairo is considered one of the most luxurious war castles that were built in the Middle Ages. Its strategic location is of the first degree due to the defensive importance provided by this site because it controls the cities of Cairo and Fustat, and it forms a high natural barrier between the two cities, and in this location it is possible to provide communication between The fortress and the city are in a state of siege, as it will become the last stronghold of the sit-in in case the city falls at the hands of the enemy.