Accordingly, Fritze formulated in 1980: As Germania Slavica we refer to "the area of the medieval German eastern settlement in the Slavic populated areas east of the Elbe and Saale, insofar as it has been linguistically Germanized". Walter Lammers defined: “The space between the western border of the more or less permanent Slavic settlement and the eastern border of the new German tribes, as they were in the 19th and 20th centuries. Century. ”The western border was marked by Wagria, the Wendland and the Altmark, then by the Elbe and Saale and the southern border by Upper Franconia and the Upper Palatinate ( Bavaria Slavica ).