Jacek Chachaj

Prof. Jacek Chachaj of the John Paul II Catholic University of Lublin (Faculty of Humanities, Department of History and Historiography of Central, Eastern and Eastern Europe) specializes in socio-religious history and territorial-administrative structures of the Latin Church in medieval and early modern Central/Eastern Europe, particularly Kraków Diocese and Crown Ruthenia. His work focuses on Lublin and its historical regions, combining scientific publications, popular science projects, and educational materials.

• Key Research Themes:
  • Evolution of parish networks in Lublin archdeaconry and Crown Ruthenia
  • Reconstruction of Lublin's cultural/historical urban landscape
  • Historical geography of Eastern Europe
  • Polish-Lithuanian Commonwealth military and administrative history

His most recent articles (2019-2025) emphasize interactive HGIS platforms for mapping Jagiellonian heritage, medieval church structures (e.g., St. Maurice in Zawichost), and suburban development in early modern Lublin. He has authored peer-reviewed journals like European Journal of Science and Theology and Journal of Cultural Heritage, as well as collective publications and school textbooks. Notably, he supervised 25+ diploma theses on topics ranging from Ottoman sultanas to Lublin's primary school history (2017-2025).

As a public science advocate, Prof. Chachaj contributes to radio programs (e.g., Lublin's Busola on Christmas traditions), television documentaries (Podziemne historie Lublina), and cultural events like Było nie minęło... (2017). He serves on editorial boards for journals such as Rocznik Lubelski and co-edited Lublin. Historia dzielnic (2017).