Mapping the cults of saints and using digital methods to contribute to our understanding of lived religion in medieval Sweden and Finland is the goal of a interdisciplinary research project currently ongoing at Linnaeus University, in collaboration with the Center for Digital Humanities at the University of Gothenburg. The project members are building a comprehensive, online, open-access database and mapping function to provide researchers and educators with access to previously digitized and newly digitized material from cultural heritage collections. Among this material is the earliest evidence for the veneration of saints in Sweden: fragments of liturgical books. This presentation will introduce the fragment material and its history, as well as highlight how the calendar fragments in particular will be made accessible in new ways via this future research portal.