Elisabeth Gruber, Ph.D. (2002), University of Salzburg, is Senior Scientist at the Institute for Medieval and Early Modern Material Culture, University of Salzburg. She has published a monograph, and a range of articles on medieval and urban History, including Kulturgeschichte der Überlieferung im Mittelalter, together with Ch. Lutter and O.J. Schmitt (Vienna, 2017).

Susana Zapke, Ph.D. (1993), University of Hamburg, Habilitation (2010) University of Salzburg, is Full Professor of Musicology at the University of Music and Arts of the City of Vienna. She is the project manager of several research projects on the Franco-Roman tradition, as well as on medieval and renaissance Vienna. She has published several monographs and articles, such as The Weitra Fragment: A Central European Source of Late Medieval Polyphony, together with Peter Wright (Music & Letters, 2015) .