This scholarly non‑fiction work examines the historic trial of Giordano Bruno, placing at its centre not only the theological and philosophical dimensions of his indictment but also the procedural, institutional and cultural context of late‑16th‑century Catholic Europe. Authored by Luigi Firpo, the text situates Bruno’s interrogation, transcripted documents and verdict within the broader workings of the Holy Office and its mechanisms of discipline and dissent. Through a careful reconstruction of the proceedings and an analytical commentary on their significance for freedom of thought, authority and the early modern philosophical revolt, the book offers a thorough account of how Bruno’s ideas on infinity, cosmos and the unity of nature collided with orthodox dogma. The structure alternates archival transcriptions, detailed narrative and reflective theorising, contributing to the historiography of the early modern Inquisition and the intellectual legacy of Bruno.