The Benedictine Reform
Dunstan was the foremost of the three reforming bishops -- with Aethelwold of Winchester and Oswald of Worcester -- who renewed English monastic life in the tenth century. His own formation as a monk at Glastonbury and his exposure to continental discipline at Mont Blandin in Flanders gave the movement its model: a return to the Rule of St Benedict and the restoration of regular communities.
As Archbishop of Canterbury he carried the reform across the English church. He forbade simony, ended the custom of clerics appointing their relatives to office, oversaw the rebuilding of monasteries, enforced clerical celibacy, replaced secular canons with monks in cathedral churches, and required parish priests to be properly qualified. The movement he led made the reformed monasteries centers of learning and renewed the discipline of the wider church.