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) who ruled over Egypt, North Africa, Levant and the Holy Lands. He was known for being ruthless by killing thousands of Christians and burning many churches including Church of the Holy Sepulchre which was one of main reason for Pope Urban II to call for first Crusade. Al-Hakim bi-Amr Allah ended up defied by Druze, he is also idolized Shia Ismaili sect of Nizaris. al-Hakim's life and rule have earned him such monikers as "the Nero of Egypt", and "the Mad Caliph".