The focus of my research is the Latin-language chorography of Hungary, Regni Hungariae Archaeologiae libri tres, by Wolfgang Lazius, a 16th-century Viennese humanist and true polymath, who devoted his life to historiography and cartography, in addition to medicine. He was an extremely prolific author, but he did not leave behind any theoretical works of a medical nature, but rather made a name for himself as a cartographer and historian. Although many studies of Lazius’ work have been written, they focus mainly on his cartographic activities. Of the historical writings that make up the bulk of his oeuvre, those that have been published in print have been examined, and those that survive in manuscript have been the focus of research in the last decade. The significance of the dissertation lies in the fact that it examines one of Lazius’ surviving manuscripts, a text which has escaped the attention of both Hungarian and international scholars precisely because of its manuscript nature.