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