Al-Fadl ibn Salih

Al-Faḍl ibn Ṣāliḥ ibn ʿAlī ibn ʿAbd Allāh ibn al-ʿAbbās (740 –789) was the Abbasid governor of a number of different provinces in Syria during the late 8th-century CE. He was also governor of Egypt for a brief period of time. He was related to the Abbasid caliphs and was part of the Banu Salih branch of the Abbasid dynasty. It was around this time when he was deposed as governor of al-Jazira and replaced by Abd al-Samad ibn Ali.

Al-Fadl was sent along with a large army to quell a rebellion in Egypt in 785. After defeating the rebels at Buwit, al-Mahdi appointed him governor of al-Fustat in Egypt. He established the soldiers' barracks and the congregational mosque of al-Askar and during his tenure the cities of al-Askar and al-Fustat merged into one large city. His governance only lasted one year and when al-Hadi succeeded his father to the Caliphate in 786, he was relieved from his position. Upon his return to Syria in 789, he had the doors of the Umayyad Mosque replaced and built the famed Bayt al-Mal treasury dome to house the mosque's funds. Al-Fadl was also responsible for the construction of the eastern Dome of the Clock, which was built in 780.