This research is both fundamental and necessary, if for no other reason than because of the complicated logistics involved. Important manuscripts from the 8th and 9th centuries are kept in libraries in various locations, including Saint Petersburg, the Sinai region, Cairo, Lebanon, Syria – and Berlin. Only a few sources have been analyzed so far, and even fewer have been subjected to scholarly discussion. “We have to fill this gap,” says Sabine Schmidtke. “After all, these are key texts, and they play an important role not only in theological analyses, but also in intercultural studies.”