Al-Hakim bi-Amr Allah
Abu Ali al-Mansur (Arabic: أبو علي المنصور, romanized: Abū ʿAlī al-Manṣūr; 13 August 985 – 13 February 1021), better known by his regnal name al-Hakim bi-Amr Allah (Arabic: الحاكم بأمر الله, romanized: al-Ḥākim bi-Amr Allāh, lit. 'The Ruler by the Order of God'), was the sixth Fatimid caliph and 16th Ismaili imam (996–1021). Al-Hakim is an important figure in a number of Shia Ismaili sects, such as the world's 15 million Nizaris and 1–2 million Musta'lis, in addition to 2 million Druze.