On September 14-15, 2023, the Program in Constitutional Theory, History and Law was the co-sponsor of an international conference in Bologna, Italy, on the topic of landmark judgments in constitutional cases. The conference, organized by program director Jason Mazzone in collaboration with Professors Francesco Biagi (University of Bologna) and Justin Frosini (Bocconi University), brought together scholars from around the world to examine the designation, significance, and trajectory of landmark cases in different nations. Mirosław Granat, former Justice of the Constitutional Court of Poland, gave the conference keynote address. Papers from the conference will be published next year as a book. The conference was the fifth meeting of the Illinois-Bologna series in Constitutional History: Comparative Perspectives.