Al-Amir Bi-Ahkamillah was the tenth Fatimid Caliph (1101-1130). Like his father Al-Musta'li (1094-1101), Al-Amir was controlled by the regent Malik al-Afdal (1094-1121) and had little influence in political matters. However, after the overthrow of al-Afdal in 1121 he managed to gain control of government. His reign was marred by the loss of Tyros to the Crusaders, as well as by the continuation of the Shiite schism between the Nizari (Assassins) and the Mustalids. Wikipedia
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