Abu Tamim Ma'ad al-Mu'izz Li-Dinillah (932 – 975) (Arabic: "Fortifier of the religion of God"), also spelled as al-Moezz, is the fourth Fatimid Caliph and 14th Ismaili imam, and reignes from 953 to 975.

It is during his caliphate that the center of power of the Fatimid dynasty is moved from Ifriqiya (northern Africa) to the newly conquered Egypt.

Fatimids establish the city of al-Qāhiratu "the Victorious" (Cairo) in 969 as the new capital of the Fāṭimid caliphate in Egypt.