thumb|Corvey today
The Princely Abbey of Corvey ( or ) is a former Benedictine abbey and ecclesiastical principality now in North Rhine-Westphalia, Germany. It was one of the half-dozen self-ruling princely abbeys of the Holy Roman Empire from the Late Middle Ages until 1792 when Corvey was elevated to a prince-bishopric. Corvey, whose territory extended over a vast area, was in turn secularized in 1803 in the course of the German mediatisation and absorbed into the newly created Principality of Nassau-Orange-Fulda. Originally built in 822 and 885 and remodeled in the Baroque period, the abbey is an exceptional example of Carolingian architecture, the oldest surviving example of a westwork, and the oldest standing medieval structure in Westphalia. The original architecture of the abbey, with its vaulted hall and galleries encircling the main room, heavily influenced later western Romanesque and Gothic architecture. The inside of the westwork contains the only known wall paintings of ancient mythology with Christian interpretation in Carolingian times. it is today thought to be near . The first monks arrived in 816 from the Benedictine abbey from Corbie Abbey in Picardy. They set up a Probstei, a subsidiary of the motherhouse. Due to the inappropriate location chosen, the monks chose to move in 822 – to the current location near what was then called Villa Huxori. The new house became known as Nova Corbeia (Latin for the "new Corbie"; Old German: Corvey ).
The first abbot of Corvey was a cousin of Charlemagne, Adalard of Corbie. Ansgar, who later became the "Apostle of Scandinavia", founded the abbey school in 823. The abbey library was established with 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 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, in 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.
thumb|right|200px|Initial page of the [[Wernigerode Gospels. A 10th-century book illumination from the scriptorium of Corvey Abbey, now in the Morgan Library & Museum in New York.]]
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 of the abbey" (Kaminsky), and his successor Erkenbert (1107–1128) saw the abbey through the critical period.
The abbey also participated in attempts to reform the Catholic Church during the 11th century. It was the dominant theological centre in the region and established numerous subsidiary abbeys.
In 1508, books 1–6 of Tacitus' Annals were discovered at the abbey by Giovanni Angelo Arcimboldi (future Archbishop of Milan).
In 1634, during the Thirty Years War the abbey building was sacked by imperial troops who also laid siege to Höxter. It was later demolished. Only the Westwerk remained. The poet and author of the Deutschlandlied, August Heinrich Hoffmann von Fallersleben, worked here as librarian from 1860 until his death in 1874.