Piotr Eberhardt Piotr Eberhardt 2015 88 1 77 http://dx.doi.org/10.7163/ GPol.0007 April 2014 September 2014 Geographia Polonica 2015, Volume 88, Issue 1, pp. 77-105 http://dx.doi.org/10.7163/GPol.0007 INSTITUTE OF GEOGRAPHY AND SPATIAL ORGANIZATION POLISH ACADEMY OF SCIENCES www.igipz.pan.pl www.geographiapolonica.pl THE ODER-NEISSE LINE AS POLAND’S WESTERN BORDER: AS POSTULATED AND MADE A REALITY Piotr Eberhardt Institute of Geography and Spatial Organization Polish Academy of Sciences Twarda 51/55, 00-818 Warsaw: Poland e-mail:
[email protected] Abstract This article presents the historical and political conditioning leading to the establishment of the contemporary Polish-German border along the ‘Oder-Neisse Line’ (formed by the rivers known in Poland as the Odra and Nysa Łużycka). It is recalled how – at the moment a Polish state first came into being in the 10th century – its western border also followed a course more or less coinciding with these same two rivers. In subsequent cen- turies, the political limits of the Polish and German spheres of influence shifted markedly to the east. However, as a result of the drastic reverse suffered by Nazi Germany, the western border of Poland was re-set at the Oder-Neisse Line. Consideration is given to both the causes and consequences of this far-reaching geopolitical decision taken at the Potsdam Conference by the victorious Three Powers of the USSR, UK and USA. Key words Oder-Neisse Line • western border of Poland • Potsdam Conference • international boundaries Introduction districts – one for each successor – brought the loss, at first periodically and then irrevo- At the end of the 10th century, the Western cably, of the whole of Silesia and of Western border of Poland coincided approximately Pomerania.