Günter Prinzing was Professor of Byzantine Studies at the Universität Mainz, from 1986 until his retirement in 2008. His research focuses on Byzantine history, with special interests in Southeast or East-Central Europe, and in Byzantine vernacular literature. He is the editor of the corpus of letters and legal acts issued by Demetrios Chomatenos, archbishop of Ohrid (1216-1236): Demetrii Chomateni Ponemata diaphora, Corpus fontium historiae Byzantinae, 38 (Berlin and New York, 2002).