English: Al-jāmiʿ al-aqmar, or al-Aqmar Mosque (Arabic: الجامع الأقمر , literally: Moonlit mosque), was built in Cairo, Egypt, as a neighborhood mosque by the Fatimid vizier al-Ma’mun al-Bata’ihi in 1125-6 CE (519 Hijri).[1] Similarly to the mosque of al-Azhar (970) and the mosque of al-Hakim (990-1013), formerly named al-Anwar, the name of the al-Aqmar mosque is an epithet of the patron in connection with light.[2] The mosque is situated on what was once the main avenue and ceremonial heart of Cairo, in the immediate neighborhood of the Fatimid caliphal palaces, known today as Muʿizz Street.