Qal'at Salah al-Din in Cairo, Egypt. Built in the period 1176 to 1183, using prisoners of Norman. Added to the Muhammad Ali mosque. The headquarters for the rule of Egypt since the days of Salah al-Din (1183) until the transfer of Khedive Ismail government headquarters to Abdeen Palace, which was built for this purpose in the 1860 contract. Qal'at Salah al-Din is located in the neighborhood "fortress" - the successor - has been erected on one of the hills separate from Mount Mukattam on the outskirts of the city of Cairo. Muhammad Ali mosque inside the castle The citadel of Saladin Ayyoubi Cairo grander castles constructed hostilities in the Middle Ages strategic site in the first degree is provided by this site, including the importance of defense because it controls the cities of Cairo and Fustat, as it constitutes a natural barrier between the two cities as high as that this site can provide communication between The castle town in the state of siege as it will become the last stronghold of the sit-in the case if the city fell, however, the enemy. We have passed this castle many faces and many historic events witnessed historic events city walls during different eras Ayyubid and Mamluk era and the French campaign on Egypt in 1798, and even took the Muhammad Ali Pasha of Egypt, where he sentenced them prosperity and greatness. The Sultan Nasser Salah al-Din Yusuf ibn Ayub first thought of building the fortress on asthma Signpost in 572 e / in 1176, where he and Secretary of Bahaa Eddin Al Assadi, demolished mosques DICTATOR The graves that were located on the Signpost to build upon the castle where the workers sculpted rock and a trench artificially separated from Mount Mukattam Signpost increase in vulnerability and strength