Co-Produced Religions: Judaism, Christianity, Islam

Our goal is to provide the foundations of a new history of Judaism, Christianity, and Islam as co-produced communities, a history that makes clear the many different ideas and ideals that each of these communities has formed, and continues to form, by interacting with or imagining the others.

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Source in the Spotlight

The Church of Saint George in al-Salt as a Co-Produced Religious Site

Located on what local residents refer to as the ‘Harmony Trail’ in the city of al-Salt in Jordan is the three-hundred and fifty-year-old Church of Saint George also known to Christians as al-Khader Church, and known to Muslim visitors as Maqam al-Khidr.

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All Case Studies

Latest Case Study

Co-Producing Love and Paradise: The Sicilian School of Poets

The idea of a sensual paradise might seem foreign to medieval Christian devotion. But it was an important motif in the love poetry of the Sicilian School, and likely emerged from interactions between Christian and Muslim poetic traditions in the island’s Norman and Swabian courts. This article explores these hybrid origins – and how nationalist accounts have historically silenced them in favour of exclusively domestic narratives.

Peter of Eboli, Liber ad honorem Augusti (Bern, Burgerbibliothek, Cod. 120.II, lat., f. 101
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Event: International Conference and Workshop

Insular Entanglements: Malta, 300-1700

June 16-19, 2026 Valetta, Malta

International Conference in Valetta, June 16-19th, 2026

Organizers: Mohamad Ballan (Stonybrook University) and Katharina Heyden (University of Bern)

Our upcoming conference "Insular Entanglements: Malta, 300-1700" examines Malta as a case-study of Mediterranean entanglement from Late Antiquity through the Early Modern period. The notion of entanglement that we propose is quite capacious, encompassing not only (nor even primarily) quotidian interreligious interactions but ideas of connections, polemics, memory, histories, and texts more broadly. This will include intellectual networks, economic and political connections, language, cultural encounters, religious thought and polemics, as well as the relationship between the local (Malta) and regional (Mediterranean). The idea of frontiers and borderlands will constitute an important theme of the conference, but we will also explore questions of materiality and material culture in early Christianity, the complex (and ever-changing) relationship between religious and cultural traditions, and the larger political transformations taking place across the medieval and early modern Mediterranean world.

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Latest Publication

Co-produced Religions: Judaism, Christianity, and Islam

Harvard Theological Review 118 (2025), 159-180.

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About

Who we are

The project is coordinated by Katharina Heyden, Professor for Ancient History of Christianity and Interreligious Encounters at the University of Bern (Switzerland), and David Nirenberg, Leon Levy Professor at the Institute for Advanced Study, Princeton (U.S.), and includes a network of collaborators across North America, Europe, and the Middle East.

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