The abbey was founded in 1093 by
Count Heinrich the Fat of
Northeim and his wife Gertrude so that the members of noble families from the area might be buried in a place with monks permanently in attendance.
Archbishop Ruthard of
Mainz participated in the foundation. The first monks came from
Corvey Abbey: a close association between the two foundations would endure. In 1102 the founder, who had been killed by invading
Frisians, was himself buried in the abbey church. The late eleventh century was a period of monastic and ecclesiastical reform, and from the outset Bursfelde was influenced by the
new ideas coming out of
Cluny and
Hirsau. Although one motive for the abbey's foundation was clearly that the souls of the faithful departed kinsfolk of the founder might be properly prayed for, the founder's dynastic ambitions and the pressures of the church reform movement also played their part.
Emperor Henry IV granted Bursfelde numerous privileges and immunities. Following the Benedictine tradition, Almeric, the first abbot, opened a school, which soon became famous. Under the next four abbots its fame continued to increase. The abbey complex was created on the Miminde estate, which
the founder had inherited from Albert von Gieselwerder. The site lay at the confluence of the Rivers
Nieme and
Weser.
Henry's father,
Otto of Nordheim, had previously erected the a couple of kilometers up
river, which provided a measure of protection. During the 15th century a strong current of monastic and ecclesiastical reform made itself felt throughout the
Roman Catholic world. One of the first Benedictine reformers was John Dederoth of Northeim. After carrying out notable reforms at
Clus Abbey, where he had been abbot since 1430, Dederoth was persuaded by Duke
Otto of Brunswick in 1433 to undertake the reform of Bursfelde. Obtaining four exemplary religious from the monastery of
St. Matthias' Abbey, Trier, he assigned two of them to the monastery at Clus, to maintain his reformed discipline there, while the other two accompanied him to Bursfelde. As abbot of Clus, he was able to recruit from that community for Bursfelde. Dederoth succeeded beyond expectations in the restoration of Bursfelde and began the reform of Reinhausen Abbey, near
Göttingen, but died on 6 February 1439, before his efforts in that quarter had borne fruit. ==Bursfelde Congregation==