Pepin rebuilt the monastery and bestowed great estates upon it by a deed of gift dated 13 August 762.

[2] The church, dedicated to the Saviour (Salvator), was not completed until the reign of Charlemagne, and was consecrated on 26 July 799 by Pope Leo III.

Several of the Carolingians entered the religious life at Prüm; among these was Charlemagne's illegitimate son Pepin the Hunchback, who was exiled there after an abortive uprising and died there in 811, and Lothair I, who became a monk in 855.

Abbot Regino of Prüm (893–99) made a name for himself as historian and codifier of canon law.

Finally, when the abbey was near ruin, Pope Gregory XIII issued the decree of incorporation, dated 24 August 1574, which was carried into effect in 1576 after the death of Abbot Christopher of Manderscheid.

The abbey was now brought into order within and without, and once more flourished to such a degree that the two French Benedictine antiquarians Edmond Martène and Ursin Durand, who visited the monastery in 1718, stated in their Voyage littéraire that of all the monasteries in Germany, Prüm showed the best spirit, and study was zealously pursued.

In 1801, Prüm, occupied by French revolutionary troops since 1794, was formally annexed to France, secularized, and its estates sold; Napoleon gave its buildings to the city.

[6] The remaining monastic buildings are now used for the secondary school named the "Regino-Gymnasium" after the Abbot Regino of Prüm.

The Sandals of Jesus Christ are considered to be the most notable of the many relics of the church; they are mentioned by Pepin in the deed of 762.