In the Anglophone world Silesia is largely uncharted territory, but despite the lack of English-language scholarship on this region, this complicated patchwork of principalities that lay between the Bohemian and Polish kingdoms was in many respects the heart of Central Europe in the early modern period. Among German and Polish scholars in particular, this region has received significant attention in recent years and, as we approach the quincentenary of the Lutheran Reformation, research has turned to the territory's religious heritage. Die Reformierten in Schlesien examines a neglected aspect of Silesia's Reformation past. The region is most closely associated with Luther. The city council of its most important urban centre, the thriving trade hub of Breslau (Wrocław), forged close links with Wittenberg, and one of the region's most influential dukes, Friedrich ii, helped to introduce a mild form of Lutheranism that did not lead to the outbreaks of peasant violence that convulsed other areas of Central Europe. The editors of this volume, however, draw our attention to the region's neglected Reformed communities. In broader treatments of international Calvinism, Silesia is rarely if ever mentioned. The memory of its Lutheran past predominates. This collection of essays nuances our understanding of Silesia's religious topography with a wide-ranging consideration of the Reformed presence. Situated on the busy crossroads of Central Europe, Silesia was in fact an ideal centre for the growth and spread of the Reformed movement across Mitteleuropa. The essays effectively highlight the transnational nature of Calvinism in the Silesian context with articles investigating connections with Poland/Lithuania, the western regions of the Empire, Bohemia and Moravia, and France. It is not surprising, then, as Luka Ilić ably demonstrates, that a figure such as the controversial humanist Andreas Dudith, who had substantial links with leading Reformed figures across the continent, would find a home in Breslau at the end of the sixteenth century. The essays also reflect a variety of disciplinary perspectives. From historical theology to art history, from literary studies to history, the editors have included a group of articles that present the Reformed experience in a variety of contexts. In so doing, they illustrate how deeply this tradition affected Silesian culture. Jan Harasimowicz has shown, for example, that the famous Lutheran Peace Churches (Unesco World Heritage sites) were actually inspired by Reformed architectural models in France. In sum, the essays are an effective introduction to Silesia's ‘second Reformation’ that has for far too long remained obscured in the long shadow of Martin Luther.