Al-Fadl ibn Sahl

Al-Fadl ibn Sahl
Abbasid gold dinar, naming Caliph al-Ma'mun and al-Fadl, with his title Dhu 'l-Ri'āsatayn
Born	c. 770 Khurasan, Abbasid Caliphate
Died	13 February 818 Sarakhs, Abbasid Caliphate (now Iran)
Occupation(s)	Abbasid vizier and official
Years active	c. 813 – 817
Era	Abbasid
Parent	Sahl (father)
Relatives	Hasan (brother) Buran (niece)

Abu l-Abbas al-Fadl ibn Sahl ibn Zadhanfarukh al-Sarakhsi (Arabic: أبو العباس الفضل بن سهل بن زادانفروخ السرخسي, romanized: Abu’l-ʿAbbās al-Faḍl ibn Sahl ibn Zādānfarrūkh as-Sarakhsī; died 818), titled Dhu 'l-Ri'āsatayn ("the man of the two headships"), was a famous Persian^[1] vizier of the Abbasid era in Khurasan, who served under Caliph al-Ma'mun (r. 813–832). He played a crucial role in the civil war between al-Ma'mun and his brother al-Amin (r. 809–813), and was the vizier of the Abbasid Caliphate until 817.