Abū ʿAbd Allāh Muḥammad ibn Jaʿfar, 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".
Gold dinar of al-Mu'tazz, minted at Samarkand in AH 253 (867 CE)
al-Mu'tazz Sends Gifts to Abdallah ibn Abdallah, from the Tarikh-i Alfi manuscript, c. 1592–1594
The Anarchy at Samarra was a period of extreme internal instability from 861 to 870 in the history of the Abbasid Caliphate, marked by the violent succession of four caliphs, who became puppets in the hands of powerful rival military groups.
Harem wall painting fragments from 9th-century Samarra
Silver dirham of al-Muntasir
Gold dinar of Caliph al-Mu'tamid (r.870—892), minted in c. 884/5, with the names of Commander in chief al-Muwaffaq and the Vizier Sa'id ibn Makhlad (Dhu'l-Wizaratayn), The Zanj Rebellion was active during al-Mu'tamid's reign from 870s until c. 883