And since he confirmed the strict rule of Cluny, they extol him further as one of the reformers of monasticism.”==References====Further reading==* Norwich, John Julius, "The Popes: A History" (2011)* Levillain, Philippe, "The Papacy: Gaius-Proxies", Routledge (2002)* Mann, Horace K., "The Lives of the Popes in the Early Middle Ages, Vol.
* Norwich, John Julius, The Popes: A History (2011)* Levillain, Philippe, The Papacy: Gaius-Proxies, Routledge (2002)* Mann, Horace K., The Lives of the Popes in the Early Middle Ages, Vol.