Piotr Pranke is Assistant Professor in the Faculty of Historical Sciences at Nicolaus Copernicus University, Toruń, Poland, and deals with the history of medieval Scandinavia and Central and Eastern Europe. His scientifc interests include the history of trade in the Viking era and the history of the Ottonian Empire and its infuence on the shaping of the areas of East Central and Northern Europe.Łukasz Różycki is Professor of History at Adam Mickiewicz University, Poznań, Poland. His main research interests include the study of Roman and Byzantine theory of warfare, with a particular focus on military treatises.Marcin Lisiecki is Professor in the Faculty of Humanities at Nicolaus Copernicus University, Toruń, Poland. His scientific interests focus on popular culture, animated film, and research on myths, among other areas.