works from Corbie, augmented by the output of the local scriptorium. In 826, Corvey became an independent abbey, dedicated to Saint Stephen. In 833, it was granted the right of coinage within the Franconian realm, as the first place east of the Rhine. In 836, the remains of Saint Vitus were gifted to Corvey by the abbey of St Denis near Paris. Saint Vitus now became the patron saint of the Saxons. Since he was also one of the Fourteen Holy Helpers, his veneration was very popular in the Middle Ages and Corvey became a destination for pilgrims. Other gifts and donations by individuals made Corvey one of the richest abbeys in Central Europe and made possible ambitious building projects. Its position as Reichsabtei meant that its abbot was answerable directly to the emperor in secular matters. The first stone church was consecrated in 844. In 873–885, the Westwerk that is still extant today was constructed. Corvey thus became "one of the most privileged Carolingian monastic sanctuaries in the 9th-century Duchy of Saxony". It soon became famous for its school, which produced many celebrated scholars, among them the 10th-century Saxon historian Widukind of Corvey, author of Res gestae Saxonicae. From its cloisters went forth a stream of missionaries who evangelised Northern Europe. The site of the abbey, where the east-west route called the Hellweg crossed the Weser, was of some strategic importance and assured its economic and cultural importance. The abbey's historian H. H. Kaminsky estimates that the royal entourage visited Corvey at least 110 times before 1073, occasions for the issuance of charters. Imperial rights granted A diploma granted by Otto I in 940, the first of its kind, established the abbot, Folcmar, on a new kind of setting. The abbot was granted bannus – powers of enforcement – over the population of peasants that were to seek refuge in the fortress built in the monastery's lands; in return they were expected to maintain its structure, under the abbot's supervision. The workforce under monastic protection was drawn from three pagi, under the jurisdiction of four counts, who, however, were to have no rights to demand castlework from them. Strife and decline In the Investiture Controversy, the abbot of Corvey took a stand with the Saxon nobles against Henry IV, Holy Roman Emperor. Its abbot Markward (served 1081–1107), "without doubt one of the most important abbots of the thousand-year history