This article highlights Father Carlo Braga CM’s significant yet underrecognized contributions to the Liturgical Reform. Utilizing documents from the newly accessible digital catalog of the Fondo Braga, this study reveals Braga’s crucial role in shaping key liturgical documents, particularly Inter Oecumenici. The digitalization of the Fondo Braga enhances the availability of these important archives, opening up new possibilities for research into the Liturgical Reform.