Amatus of Montecassino

His history is the earliest extant account of the Norman sieges of Bari and Salerno, their conquest of Sicily, and the careers of both Robert Guiscard and Richard Drengot, as well as the Gregorian Reforms seen from the papal point of view.

Possibly having been born in Salerno, Graham Loud suggests that he might have served as the Bishop of Paestum in the 1050s, prior to his admission into the monastery.

[2] Desiderius' election as abbot, however, coincided with Richard Drengot's annexation of Capua, after which Dregnot became the protector and patron of the abbey, which heavily affected Amatus' writings.

[4] Amatus' L'Ystoire de li Normant chronicles the history of the Normans in Southern Italy, from their arrival to the death of Richard Drengot of Capua.

Despite this, Wolf argues that comparisons with the second version of the Chronica monasterii Casinensis, written by Leo Marsicanus and incorporating parts of Amatus's original text, suggest that the corrupted French translation is not completely inaccurate.