LEO OF OSTIA

'Leo Marsicanus' (meaning "of the Marsi") or 'Ostiensis' (meaning "of Ostia") was of noble birth and became a monk in Monte Cassino around 1061.
In Monte Cassino, he became a friend of Desiderius of Benevento, later Pope Victor III, and it was to him that Leo dedicated his most famous work as an historian and chronicler: the ''Chronicon Monasterii Casinensis'', usually called the Montecassino Chronicle in English. The chronicler depends largely on Amatus' earlier work, but also on oral traditions and other archives. It was only begun after 1098 and Leo finished it at 1075; it is continued by the monastic librarian Peter the Deacon. In 1101, Pope Paschal II created him cardinal-bishop of Ostia.

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Sources

★ Norwich, John Julius. ''The Normans in the South 1016-1130''. Longmans: London, 1967.

★ Catholic Encyclopedia article