Gregory the Great's influence in the carolingian times can be traced from Ambrosius Autpertus to the end of the IXth century through many writers. Some works deserved a special attention : some letters from Alcuin, a florilegium in the London British Library Arundel 213, an other florilegium De qualitate futurae ac perpetuae vitae attributed to a mysterious Emmo maybe linked with Guillaume de Gellone, the carolingian legislation through the concilia, Raban Maur, a letter of pope Nicolas I to the byzantine emperor Michel III, Hincmar of Reims in the De cavendis vitiis et virtutibus exercendis, and the breton hagiography of the end of the IXth century.