Philipp studied Medival History and Classical Archaeology at Humboldt University, Berlin (Magister Artium in 2011). He received a PhD from Humboldt University in 2017. In his thesis he studied individual and small groups of Greek-speaking immigrants and their descendants in early medival Rome (7th – 9th centuries) and their relationship to local society. Conceptualizing “society” as an ongoing process of mutual statement of belonging, he analysed a variety of sources (from hagiography through theological tracts and material remains), asking for both the migrants’ self-positioning and the resonance that it found among the Romans in different shorter time-frames within the Roman early middle ages. His bok on the matter is currently in preprataion for printing with De Gruyter and will appear in late 2019 or early 2020 und the title Migranten und Stadtgesellschaft im frühmittelalterlichen Rom.
Besides early medival migration, Byzantine relationship with the west, and the Roman middle ages, his research interests include discourses of property and the social meaning of economy as well as, more generally, social and ecclesiastical history of the early and high middle ages.