The Umayyads were Arabs, but the majority of their subjects were not. Their discontent at their treatment as second-class citizens fuelled the Abbasid Revolution that overthrew the Umayyads in 750. The Abbasids created another settlement northeast of Fustat, but the population remained restless. A rebellion broke out in 868, and a Turkic commander called Bakbak was sent to Egypt to suppress it. He was accompanied by his nephew, Ahmad ibn Tulun, who managed to become the de facto ruler of Egypt (and Syria). Like every one of his predecessors, ibn Tulun established a new administrative capital called al-Qata'i to the northeast of every other settlement. He built palaces, hospitals, aqueducts, and a grand mosque named after him at the heart of al-Qata'i.