The Introduction places the book into its historical and historiographic contexts. German-language music theatre often plays a supporting role in musical histories of Central Europe circa 1800, as does the Holy Roman Empire. The Holy Roman Empire was home to over 300 territories that were linked by politics and culture. Physically networking the Empire was Europe's first systematic postal system, which served as a precondition for the operation of the hundreds of theatre companies that performed within its territories . By first considering the contemporary and scholarly distinctions between German-language theatre and the 'Nationaltheater', this introduction draws on recent historiography to provide a musicological audience with the key features of, and concepts surrounding, the Holy Roman Empire. It then traces this long misunderstood polity's place in music historiography and ultimately posits it as an ideal framework to investigate the world of German music and theatre in the decades leading up to the turn of the nineteenth century.