The Fraknói Research Group held it's fifth workshop on 27 October 2021 at University of Szeged's Kuno Klebelsberg Library in Szeged where the volume Pápai csapatok Magyarországon (1595–1597, 1601) was presented by the author Tamás Kruppa. The book consists 137 letters from Aldobrandini correspondence.
The volume in question is Tamás Kruppa’s first result from the Apostolic Archive. The book gave insight into the weekdays and circumstances of the papal army during the Hungarian campaign. In his lecture Kruppa presented precisely the pontifical army’s taken role in the Fifteen Years War. There were only a few periods in the history of Hungary when the Western countries, including the papacy, paid such attention to the Kingdom of Hungary and the Principality of Transylvania than that of during the Fifteen Years’ War.