Dr Hans-Christian Lehner (1982) is research fellow of Medieval History at the University Erlangen-Nuernberg. His monograph Prophetie zwischen Eschatologie und Politik(Franz Steiner Verlag, 2015) was focusing on prognostics as outlined in medieval historiography. He edited, translated, and annotated the 12th century Visio Tnugdali (with Maximilian Nix, Wissenschaftliche Buchgesellschaft, 2018) and is the editor of a fair number of volumes, e.g. The End(s) of Time(s) (Brill, 2021) and Prognostication in the Middle Ages - A Handbook (with Matthias Heiduk and Klaus Herbers, De Gruyter, 2021).

Klaus Herbers, Dr. phil. (1984), University of Berlin, is Senior Professor of Medieval Histor at the University of Erlangen-Nuremberg. He has published monographs, edited volumes and many articles on European Medieval Historia (Hagiography, Iberian Historia, papal History), including works on medieval prognostication.