Christian-Muslim Relations 600 - 1500

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Theophilus of Edessa, Theophilus bar Tuma, Thawfīl al-Rūmī
(445 words)

Theophilus of Edessa

Date of Birth: 695 or shortly before

Place of Birth: Unknown, probably Edessa

Date of Death: 15 July 785

Place of Death: Unknown, probably Baghdad


Theophilus accompanied the ʿAbbasid Caliph al-Mahdī as astrologer on some of his military campaigns before the year 768, probably the campaigns to Khurāsān and Ṭabaristān (758-59). Thereafter, he became al-Mahdī’s chief astrologer i…

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G.B. Teule, Herman, “Theophilus of Edessa, Theophilus bar Tuma, Thawfīl al-Rūmī”, in: Christian-Muslim Relations 600 - 1500, General Editor David Thomas. Consulted online on 29 January 2020 <>
First published online: 2010

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