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Abdullah al-Mahdi Billah
Founder of the Fatimid Caliphate
Years: 873 - 934
Abu Muhammad Ubayd Allah al-Mahdi Billah (873-934), often referred to as Ubayd Allah, is the founder of the Fatimid Caliphate, the only major Shi'a caliphate in Islam, and establishes Fatimid rule throughout much of North Africa.
