Joerg (Jörg) Sonntag (born 1977 in Erlabrunn, Saxony)[1] is a German historian of medieval history.
From 2009 to 2012, he worked at the Research Center for the Comparative History of Religious Orders (FOVOG), first at the Catholic University of Eichstätt, then at Dresden.
In the same year, he was appointed a private lecturer (Privatdozent) in Medieval History at the TU Dresden and was elected as a member of the Young Forum of the Saxon Academy of Sciences.
He has studied the comparative history of religious orders, including models, rituals and forms of symbolization as well as the cultural functions of games, of imitations, and of hair in medieval times.
He applied a new approach that analyzes the interrelations between the social, political, ethical and religious functions of hair, and reveals the overarching structures of its usage.