Abstract: From the sixteenth to the eighteenth centuries, over three generations, the Gallaup de Chasteuil family developed a significant private library in Aix-en-Provence, collecting an impressive amount of medieval printed books and manuscripts that they read, annotated, and recomposed. The scrutiny of this library and the analysis of some of the books it contained (that had never been identified as such until now) is extremely valuable for the understanding of the reception and the reading of medieval texts during the Ancien Régime.
