Abū ʿAbd Allāh Muḥammad ibn Jaʿfar ibn Muḥammad ibn Hārūn al-Muʿtazz bi-ʾLlāh, better known by his regnal title al-Muʿtazz bi-ʾLlāh was the Abbasid caliph from 866 to 869, during a period of extreme internal instability within the Abbasid Caliphate, known as the "Anarchy at Samarra".
- Occupation
- caliph
- Position held
- Abbasid caliph
- Citizenship
- Abbasid Caliphate
- Born
- 847
- Died
- July 16, 869
