Amr ibn al-Aas Mosque or (Al-Fatah Mosque, Old Mosque, Crown of Mosques) is one of the historic mosques of Cairo. It was established during the era of Amr ibn al-Aas’ rule of Egypt in the city of Fustat, which was founded by Muslims as the first Islamic capital.
The area of the mosque at the time of its construction was 50 cubits by 30 cubits and had six doors. It remained that way until the year 53 AH / 672 AD, when expansions continued. Maslama bin Mukhlid Al-Ansari, governor of Egypt by Muawiyah bin Abi Sufyan, increased its area and built four minarets in it. Repairs and expansions continued after that. The hand of those who ruled Egypt until its area, after continuous expansion operations, reached about twenty-four thousand architectural cubits. It is now 120 by 110 metres.
During the Crusade against Muslim countries, specifically in the year 564 AH, Minister Shawar feared that the Crusaders would occupy the city of Fustat, so he set fire to it as he was unable to defend it. Fustat was burned, and the Amr ibn al-Aas Mosque was among the things that were burned, destroyed, and destroyed. When Saladin annexed Egypt to his state, he ordered the rebuilding of the mosque again in the year 568 AH. The mosque and the large mihrab, which was covered with marble and inscribed with inscriptions including his name, were rebuilt.