Thomas Kohl (PhD in Medieval History 2008, Johannes Gutenberg University Mainz) was a POLY Writing Fellow in the Winter Term 2025/26 and member of the Writing Group "(Re-) Ordering Space." During the group's meetings at Forschungskolleg Humanwissenschaften Bad Homburg in February and June/July 2026, he developed a contribution as part of the group’s chapter for the first of three volumes of POLY's forthcoming book project, Doing Christianity: A Praxeological Guide to Polycentricity and Plurality of Premodern Christianities.