Ali ibn al-Husayn al-Iṣfahānī (Arabic: أبو الفرج الأصفهاني), also known as Abul-Faraj, (full form: Abū al-Faraj ʿAlī ibn al-Ḥusayn ibn Muḥammad ibn Aḥmad ibn al-Ḥaytham al-Umawī al-Marwānī al-Iṣfahānī) (897–967CE / 284–356AH) was a writer, historian, genealogist, poet, musicologist and scribe. He was of Arab-Quraysh origin and mainly based in Baghdad. He is best known as the author of Kitab al-Aghani ("The Book of Songs"), which includes information about the earliest attested periods of Arabic music (from the seventh to the ninth centuries) and the lives of poets and musicians from the pre-Islamic period to al-Isfahani's time. Given his contribution to the documentation of the history of Arabic music, al-Isfahani is characterised by George Sawa as "a true prophet of modern ethnomusicology".
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