After World War I, the reorganisation of Europe created many legal interspaces. This volume is intended to be a first step towards in-depth research into Upper Silesia as a legal interspace. The focus is on Upper Silesia as an autonomous region and the jurisdiction in the Silesian Voivodeship. Seven contributions by Polish and German scholars examine the question of autonomy from an interdisciplinary perspective - historical, legal and political. The contributions compare Silesian autonomy with other Polish autonomy projects of the interwar period and situate it in contemporary legal discourse and political debate. At the same time, an arc is drawn to current attempts at autonomy in Poland. Another focus is the question of jurisdiction in Upper Silesia from a national and international perspective.