Recent research presents a solution to this problem. With the help of a newly developed pattern recognition tool, large amounts of digitised book pages can be categorised into font groups. This tool was developed in the context of a project on font-specific OCR (Weichselbaumer et al. 2019, Seuret et al. 2019) and was then used for a large dataset of digitised books from BSB Munich. This paper will present the results and provide new insights into the rapid rise of Fraktur.