Written for students and teachers, this book is designed to help them approach the history of justice at any level of learning, whether as an introduction or a specialism. The historiography that has a long tradition to date, covering periods from the Middle Ages to the XX^th century, is not the one that has published the most sources in an accessible and educational way (transcription, translation, etc.). Sharing sources and explaining how to handle them is an area of legal history that researchers have not yet fully embraced. It is undoubtedly not easy to publish letters of remission or trials, for example, and the reason for this is easy to understand: they take too long to publish in terms of volume. The fact that certain files are now available online, as on the Criminocorpus website, goes some way to alleviating this shortcoming, which this book would also like to make up for in some small way.