Al-Ma'mun al-Bata'ihi, Fatimid vizier (born c. 1086)

Abu Abdallah Muhammad ibn Fatak, better known as al-Ma'mun al-Bata'ihi, was a senior official of the Fatimid Caliphate in the early 12th century, during the reign of al-Amir.

July 20 is the 201st day of the year in the Gregorian calendar; 164 days remain until the end of the year.