Charlemagne became interested in monasticism because of the opportunities for learning and the preservation of books. He supported the institution, but from the perspective of culture and education. Louis the Pious, Charlemagne's son, commissioned Benedict of Aniane to reform monasticism within the Carolingian empire, to return to what Benedict of Nursia had originally intended. It was decided that the Rule of St Benedict would be enforced in all monasteries, and Benedict of Aniane was given the task of interpreting it and outlining how it should be practiced.