This coursebook is the first full-length study of cinematic "legal medievalism," or the modern interpretation of medieval law in film and popular culture For more than a century, filmmakers have used the "Middle Ages" to produce popular entertainment and comment on contemporary issues. Each of the twenty chapters in Law, Justice, and Society in the Medieval World represents an original contribution to our understanding of how medieval regulations, laws, and customs have been depicted in film. It offers a window into the "rules" of medieval society through the lens of popular culture. This book includes analyses of recent and older films, avant-garde as well as popular cinema. Films discussed in this book include Braveheart (1995), Kingdom of Heaven (2005), The Passion of Joan of Arc (1928), The Last Duel (2021), The Green Knight (2021), The Little Hours (2017), and The Adventures of Robin Hood (1938), among others. Each chapter explores the contemporary context of the film in question, the medieval literary or historical milieu the film references, and the lessons the film can teach us about the medieval world. Attached to each chapter is an appendix of medieval documentary sources and reading questions to prompt critical reflection.