Al-Mansur Billah

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Early Imāms Ali Hasan Husayn as-Sajjad al-Baqir Jaʿfar al-Ṣādiq Ismāʿīl ibn Jaʿfar al-Mubārak Muhammad ibn Ismāʿīl ash-Shākir ʿAbadu l-Lāh (al-Wāfī Ahmad) Ahmad (al-Taqī Muhammad) Ḥusayn (ar-Raḍī ʿAbdillāh) ʿAbdu l-Lāh al-Mahdī bi l-Lāh al-Qāʾim al-Manṣūr al-Muʿizz al-ʿAzīz al-Ḥākim al-Ẓāhir al-Mustanṣir bi l-Lāh Nizār al-Muṣṭafā li-Dīn’il-Lāh / Aḥmadu l-Mustāʿlī bi l-Lāh Manṣūr al-Āmir bi-Aḥkām’il-Lāh Abu l-Qāsim al-Tayyib
Nizari Ismaili & Taiyabi Da'is  Nizārī Ismā'īlī Aga Khan IV Taiyabi-Musta’li Ismailis Dawoodi Bohra Disputed between Mufaddal Saifuddin and Taher Fakhruddin Sulaymani Al-Fakhri Abdullah Alavi Bohra Haatim Zakiyuddin
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Abu Tahir Ismail al-Mansur Billah (913 – 19 March 953) (Arabic: المنصور بالله الفاطمي‎‎) was the third Caliph of the Fatimid Caliphate in Ifriqiya (r. 946-953).

History

Ismāʿīl was born in 913 in Raqqada near Kairouan and succeeded his father Abū l-Qāṣim al-Qā'im (934-946) in 946. His upbringing took place in North Africa, in an environment of revolts and battles

The Fatimid realm found itself deep in crisis due to the revolt of Abū Yazīd (943-947). However, after the unity of the rebels began to crack, Ismāʿīl managed to put down the revolt with the help of the Berber Zirids. Following this victory he took the epithet al-Mansur, and built a new residence at al-Manṣūriyyah near Kairouan.

Al-Manṣūr concerned himself with the reorganisation of the Fatimid state until the end of his reign. He resumed the struggle with the Umayyads of Córdoba in Morocco, and reoccupied Sicily, from where raids into Italy were recommenced. Rule in Sicily was reinforced through the installation of the Kalbids as Emirs.

Al-Manṣūr died after a severe illness on 19 March 953 and left his realm to his son al-Mu‘izz (r. 953-975).

Timeline

Time line indicating the Imam amongst Shia Imams: