Opening of the Contra Faustum Manicheum de saint Augustin contained in an old manuscript of the Monastery of Mont Saint-Michel (Avranches BM, 90, f. 1v). On 7 April 2017, the virtual library of Mont Saint-Michel, a digital library offering catalogue descriptions and digital reproductions of the works of the former monastic library, was published online. The heritage library of Avranches keeps 205 medieval and modern manuscripts and 1254 printed pro...