Inventario. Chiesa e Fondazione reale belga "San Giuliano dei Fiamminghi" a Roma presents the detailed inventory of the historical archive of the Belgian national church and foundation of San Giuliano dei Fiamminghi in Rome. The publication provides researchers with structured access to a rich documentary heritage that sheds light on historical relations between the Flemish community and the city of Rome across several centuries. By cataloguing archival material and contextual information, the book functions as a fundamental research tool for scholars working on ecclesiastical history, cultural exchanges and the presence of the Flemish community in Italy. The volume constitutes a scholarly archival inventory dedicated to the documents preserved by the Belgian church and foundation of San Giuliano dei Fiamminghi in Rome. It systematically describes archival series, historical records and documentary sources connected with the activities of the Flemish community in Rome and their institutional, religious and cultural presence. Through structured cataloguing, commentary and references, the publication enables academic research into historical networks between Flanders and Rome and contributes to the documentation of European ecclesiastical and cultural heritage within the framework of archival science and historical scholarship. Johan Ickx is a historian and archivist specialized in ecclesiastical archives and historical documentation related to the Catholic Church and European institutions. Marco Pizzo is an Italian historian and curator whose research focuses on historical archives, cultural heritage and documentary collections connected with European history. Their collaboration on this publication reflects a scholarly effort to catalogue and make accessible an important archival collection relating to the Flemish presence in Rome and the institutional history of the Belgian foundation of San Giuliano dei Fiamminghi.