al-Ḥasan b. Sahl
(325 words)

, secretary of and governor for the ʿAbbāsid caliph al-Maʾmūn, and brother of the vizier al-Faḍl b. Sahl [q.v.]. Iranian by birth, the son of a Zoroastrian convert, al-Ḥasan entered the service of the Barmakid al-Faḍl b. Yaḥyā [q.v.] during the reign of Hārūn al-Ras̲h̲īd. He later took part in al-Maʾmūn’s action against his brother al-Amīn, and when al-Maʾmūn assumed the title of caliph in 196/814 he was put in charge of taxation ( al-k̲h̲arād̲j̲ ) in the provinces which the new ruler controlled. After al-Maʾmūn’s troops had captured Bag̲h̲dād, his brother sent him to…

Cite this page
Sourdel, D., “al-Ḥasan b. Sahl”, in: Encyclopaedia of Islam, Second Edition, Edited by: P. Bearman, Th. Bianquis, C.E. Bosworth, E. van Donzel, W.P. Heinrichs. Consulted online on 18 October 2018 <>
First published online: 2012
First print edition: ISBN: 9789004161214, 1960-2007

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