The study of Claudius Ptolemy’s Geographike Hyphegesis, written around 150 AD, represents one of the most complex tasks in historical geography. With over 6,300 recorded places and their coordinates, the work forms the fundamental framework for our understanding of the ancient world.¹ The scholarly challenge arises from the discrepancy between the ancient data and modern topography, which has historically often been attributed to faulty transmission or insufficient measurement accuracy. The plausibility analysis presented here addresses a radical paradigm shift: the identification of the ancient Vistula not with the Weichsel (Vistula) in Poland, but with the system of the Black Elster in present-day Lusatia, as postulated by Sven Mildner in his publication on Germania Magna.²
This approach is based on the realization that Ptolemy calculated with an Earth circumference of 180,000 stadia, which led to a systematic distortion of the coordinates.¹ Modern research, particularly projects at the Technical University of Berlin by Kleineberg, Marx, and Lelgemann, has shown that more precise localization of ancient settlements is possible through mathematical rectification and statistical analyses.⁴ Sven Mildner’s reinterpretation expands this geodetic framework by incorporating interdisciplinary parameters from geodynamics and archaeometallurgy to create a coherent landscape reconstruction of Germania Magna.³
