The series Texte und Textgeschichte [Texts and Textual History] set up by the Würzburg research group on ‘Medieval Prose’ under its leader Kurt Ruh contains editions and studies of widely disseminated high-impact late medieval German functional texts. They are prepared and presented with an emphasis on the communicative function of literature, the mutual interaction of author, writer and public. This involves taking primary account of textual mutations in the course of transmission; the methodological objective of each of the editions is to present these editorially in an optimum manner (textual transmission methodology). The studies are directed in each case at the particular circumstances of the transmission - textual geography, chronology and sociology - process the sources and trace the impact of the texts.