This series, founded in 1990 following an earlier suggestion by Mazzino Montinari, publishes source material on Nietzsche's life, his environment, and the effects of his work. Thus, the Supplementa complement the critical editions of Nietzsche's works (KGW) and letters (KGB).

Starting with Volume 13, the renowned series of books from the Medieval Studies Institute of the University of Fribourg, Switzerland, is being published by Walter de Gruyter. The series presents a high-quality scholarly forum for interdisciplinary research in medieval studies. Its mission is to advance understanding of medieval literature, philosophy and art through soundly based research contributions. Apart from the volumes of proceedings of the biennial interdisciplinary Fribourg Colloquia, the SCRINIUM FRIBURGENSE series produces monographs from specific subject areas or from combinations of medieval subject areas represented in the Institute, i.e. general history, art history and the history of philosophy, Early Christian and Byzantine archaeology, and medieval literatures in Latin and the vernaculars. The studies contained in SCRINIUM FRIBURGENSE are distinguished by their continuation of well-established traditions of research, by the plurality of their methods, by the innovativeness of the questions posed and by their transdisciplinary methodological approach. The series is, of course, open to manuscripts from external scholars on problems of medieval research which match the profile of the series.