al-Qa'im bi-Amr Allah Muhammad ibn al-Mahdi
Abu'l-Qasim Muhammad, the Ubaydid Mahdi's son and second ruler of the dynasty, succeeding on his father's death under al-Radi; earlier he had taken most of Upper Egypt and his armies held Fustat's riverine quarter.
Reign · Fatimid Caliphate · no. 10 in the chain · 934–946 CE
Ruled the caliphate
Events of the reign
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Abu Yazid revolt (944–947)
Draft card for Abu Yazid revolt (944–947); its sources are not yet checked on the page.
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The Siege of al-Mahdiyya by Abu Yazid
In 333, Abu Yazid Makhlad ibn Kaydad — 'the man of the donkey' — besieged the Ubaydid caliph al-Qa'im in al-Mahdiyya. Four assaults followed through the year; famine inside the walls grew so severe that the people ate beasts and carrion, and al-Qa'im opened the Mahdi's granaries to his men.
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Death of al-Mahdi Ubayd Allah, ruler of the Maghrib
Under al-Radi died the Maghreb's Mahdi after a reign of twenty-five years — grandfather of the Egyptian caliphs called Fatimids. Suyuti relays hostile reports: that he claimed Alid descent with al-Baqillani quoted as saying no genealogist knew it, and that he executed scholars; his son al-Qa'im bi-Amr Allah succeeded him.