The QuantiSlav project targets one of the most significant requirements of historical linguistics: the dating and localization of the oldest handed down writings. Doing so is particularly complex in the case of Slavonic medieval literature, since linguistic innovations or adaptations in the course of a manuscript copying process could be additionally overlaid by rearchaisation tendencies. Therefore, distinguishing various properties such as word forms, orthography and text reuse, and tying them to specific geographic locations as well as temporal periods are among the challenges that the QuantiSlav project aims to tackle. Further goals encompass the development of sustainable resources in terms of infrastructure and natural language processing methods, in order to equip young Digital Humanities scholars with the respective domain-specific technical skills.