The cataloguing of the incunabula and the sixteenth-century books kept in the library of the Minor Capuchin Friars’ monastery in Bologna was carried out, where all the book funds present in the territory, coming from the convents of the entire minority province, have converged over time. The following information is provided on each sheet: the signature, the author, the title, the typographic notes, the format, the language and the provenance, or all the indications retrievable from the cover, guard page, frontispiece (such as handwritten notes, ex libris, seals, stamps) useful for retracing the conservative events of the text. As far as the library is concerned, an investigation was carried out to reconstruct the passage through time of the texts, the origins, the dispersions, which are also fundamental for understanding the culture of the Capuchin family.