In the 10th century, Dunstan brought Athelwold to Glastonbury, where the two of them set up a monastery on Benedictine lines. For many years, this was the only monastery in England that strictly followed the Benedictine Rule and observed complete monastic discipline. What Mechthild Gretsch calls an "Aldhelm Seminar" developed at Glastonbury, and the effects of this seminar on the curriculum of learning and study in Anglo-Saxon England were enormous. Royal power was put behind the reforming impulses of Dunstan and Athelwold, helping them to enforce their reform ideas. This happened first at the Old Minster in Winchester, before the reformers built new foundations and refoundations at Thorney, Peterborough, and Ely, among other places. Benedictine monasticism spread throughout England, and these became centers of learning again, run by people trained in Glastonbury, with one rule, the works of Aldhelm at the center of their curricula but also influenced by the vernacular efforts of Alfred. From this mixture sprung a great flowering of literary production.