From ... http://www.newadvent.org/cathen/02467b.htm
Founder of western monasticism, born at Nursia, c. 480; died at Monte Cassino, 543. The only authentic life of Benedict of Nursia is that contained in the second book of St. Gregory's "Dialogues". It is rather a character sketch than a biography and consists, for the most part, of a number of miraculous incidents, which, although they illustrate the life of the saint, give little help towards a chronological account of his career. St. Gregory's authorities for all that he relates were the saint's own disciples, viz. Constantinus, who succeeded him as Abbot of Monte Cassino; and Honoratus, who was Abbot of Subiaco when St. Gregory wrote his "Dialogues".