Hans-Peter Schreich’s audio lecture highlights the historical significance of the Val Müstair as a European transport route. It combines two main topics: the development of political structures in the region (in particular the emergence of the Three Leagues) and the role of the Val Müstair in transit traffic across the Alpine passes. The lecture covers a wide range of topics, from prehistoric finds to the 20th century, highlighting the region’s eventful history under Roman, Frankish and Habsburg rule, and showing how traffic routes and the political balance of power influenced each other. Finally, the lecture describes the decline of the traditional mule tracks and the increasing importance of automobile traffic in the Val Müstair.