Charles is a historian of religious thought, specializing in the interactions between medieval Muslim and Christian communities as well as the interface of Islam and Christianity. He is interested in how Muslims and Christians engaged one another through religious dialogue and the theological underpinnings of these encounters. He also reflects on the current state of Muslim-Christian dialogue through his research, writing, and teaching.


Ph.D. (2010), University of Birmingham, England



Cross Veneration in the Medieval Islamic World: Christian Identity and Practice under Muslim Rule (London: I.B. Tauris, 2017).

A Textual History of Christian-Muslim Relations (Minneapolis: Fortress Press, 2015).

Christian Identity amid Islam in Medieval Spain (Leiden: Brill, 2013).

Articles & Essays

‘Religious Aversion and Admiration in Christian-Muslim Relations’, in The Character of Christian-Muslim Encounter. Essays in Honour of David Thomas (Leiden: Brill, 2015).

‘Islam’, in The Religions Book (London: Dorling Kindersley, 2013)

‘Unheard Voices in the “Son of God” Debate: The History of Christian-Muslim Encounters’, EMQ 48, no. 3 (July 2012): 292-98.

‘From Invitation to Provocation: “Holy Cruelty” as Christian Mission in Ninth Century Córdoba’, Al-Masāq 24, no. 1 (April 2012): 21-33.

‘Re-planting Christianity in New Soil: Arabised Christian Religious Identity in Twelfth Century Iberia’, ICMR 22, no. 1 (January 2011): 55-66.

Blog Posts


    ‘Christian Perceptions of Islam’, in Christian-Muslim Relations: A Thematic History – Texts and Transmissions. Volume 1: The First Millennium (600-1600), forthcoming from Brill in 2019.

    Editor, Theological Issues in Christian-Muslim Dialogue, forthcoming from Pickwick Press in 2018.

    ‘Christians in Muslim Spain’, in Handbook on Christian-Muslim Relations, forthcoming from Routledge Press in 2018.


    American Academy of Religion

    International Qur’anic Studies Association

    North American Society of Christian Arabic Studies

    Charles Tieszen

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