Roman Foreign Policy; Provincial Administration; Political Constitution, Legislation and Juridical Practice.  Hellenistic Kingdoms, Seleucid Empire, Hellenistic and Roman Galatia in Asia Minor, Bosporan Kingdom, Hellenistic-Roman Judaea. Athenian Democracy and Citizenship Policy. Classical Historiography, Cicero, Theodosian Code, Late Roman Panegyrics and Early Christian Latin Poetry, Greek Epigraphy of Roman Asia Minor. Citizenship, Foreigners' Rights and Intercultural Naming Practices in the Greco-Roman and Ancient Celtic Worlds. Divine Cults for Hellenistic Kings and Roman Emperors, and their Impact on Christianity.