English summary: The thirteen essays in this volume were all presented originally by the author at international conferences and address three main areas of inquiry, all of which, in one way or another, are of key importance in early modern historical discourse and theological thinking. These three areas are: 1) the theological diversity and the debates that took place within the Reformed tradition in the sixteenth century and beyond; 2) Peter Martyr Vermigli's noteworthy contribution to Reformed ecclesiology and biblical exegesis; 3) aspects of Reformed thought's later enriched decor on both sides of the Atlantic. The essays show that the Reformed tradition is neither monolithic, nor monochrome, nor immutable, but is evolving rather in different, if interrelated patterns and directions.