A militant Kharijite rebel against this dynasty based in the Aurès Mountains was immortalized as the Dajjāl whose coming was foreseen by the Mahdi in this dynasty’s historiography. That rebel, Abu Yazid, was known as the “Man on the Donkey.” One ruler from this dynasty forced Jews to wear bells around their necks and angered Basil II by demolishing the Church of the Holy Sepulchre. That “mad” ruler from this dynasty, (*) al-Hakim, mysteriously disappeared on one of his meditative night walks and is venerated by the Druze. After being named vizier, Saladin usurped this dynasty and founded the Ayyubid Sultanate. For 10 points, name this Cairo-based (10[1])Islamic caliphate whose rulers claimed descent from a namesake daughter of the prophet Muhammad. ■END■