Research on manuscripts from early medieval Septimania and Catalonia has become quite sophisticated, but significant and detailed work remains to be done. The ongoing digitization of thousands of manuscript fragments, preserved especially in public, ecclesiastical, and private archives and libraries in Catalonia, will furnish a rich collection of unknown items that will allow for the reconstruction of lost testimonies of the region's religious culture from the ninth century onwards. This paper shows how modern fragmentology, based on systematic digitization and comparison of scattered pieces, enables us to rediscover and write the history of the Carolingian homiletic collections in the south-western periphery of the Carolingian empire formed by Septimania and Catalonia—both in general and in the specific case of the autochthonous Homiliary of Luculentius. [ABSTRACT FROM AUTHOR]