- Comparative regional history, particularly of western Germany
- General history of the Late Middle Ages and Early Modern period
- History of the Reformation
- General European history (with a focus on Western Europe)
- History of the city of Trier / urban and local history
- History of historiography, reception, and historical scholarship
- Theories and methods of historical research (especially within the spectrum of regional history)
- Political, social, and mentalities history of estate-based societies
- Biographical research within structural contexts
- Jewish history of the Late Middle Ages and Early Modern period
- Anti-Judaism and antisemitism