This volume launches the book series of “Inquire – International Centre for Research on Inquisitions” of the University of Bologna, a research network that engages with the history of religious justice from the 13th to the 20th century. This first publication offers twenty chapters that take stock of the current historiography on medieval and early modern Inquisitions (the Spanish, Portuguese and Roman Inquisitions) and their modern continuations. Through the analysis of specific questions related to religious repression in Europe and the Iberian colonial territories extending from the Middle Ages to today, the contributions here examine the history of the perception of tribunals and the most recent historiographical trends. New research perspectives thus emerge on a subject that continues to intrigue those interested in the practices of justice and censorship, the history of religious dissent and the genesis of intolerance in the Western world and beyond.