place_of_birth peter the deacon
Leo Marsicanus ( meaning " ___MASK41___ the Marsi ") or Ostiensis ( meaning " ___MASK41___ Ostia "), also known as Leone dei Conti di Marsi ( 1046 , Marsica  1115 / 7 , Ostia ), was a nobleman and monk ___MASK41___ Monte Cassino around 1061 and Italian cardinal from the 12th century . ___MASK11___ ___MASK34___ ( sometimes written Montecassino ) is a rocky hill about southeast ___MASK41___ ___MASK62___ , Italy , to the west ___MASK41___ the town ___MASK41___ ___MASK34___ and altitude . Site ___MASK41___ the Roman town ___MASK41___ Casinum , it is best known for its historic abbey . St . Benedict ___MASK41___ Nursia established his first monastery , the source ___MASK41___ the Benedictine Order , here around 529 . Peter the Deacon ( French : Pierre le Diacre ) was the librarian ___MASK41___ the abbey ___MASK41___ Montecassino and continuator ___MASK41___ the Chronicon Monasterii Casinensis , usually called the Montecassino Chronicle in English . The chronicle was originally written by Leo ___MASK41___ Ostia . According to both Chalandon and Lord Norwich , Peter is a poor historian and writer , much inferior to Leo . Reputedly a descendant ___MASK41___ the Counts ___MASK41___ Tusculum , he was offered in 1115 to the monastery ___MASK41___ Monte Cassino . About 1127 he was forced to leave the abbey and retired to the neighbouring Atina ( Atina , ___MASK75___ ) , because he had supported Abbot Oderisius , who had been deposed by Pope Honorius II . In 1131 he returned to the abbey owing to the death ___MASK41___ Pope Honorius . In 1137 , he appeared before Emperor Lothair II , then in Italy , on behalf ___MASK41___ his monastery . The sovereign was so pleased with him that he appointed him his chaplain and secretary , and would probably have attached him permanently to his person had not Abbot Wibald considered Peter ' s return necessary to the abbey . In 1131 on his return to Monte Cassino Peter became librarian and keeper ___MASK41___ the abbey archives , ___MASK41___ which he compiled a cartulary ( Registrum Petri Diaconi ) . Besides editing the existing chronicle ___MASK41___ Monte Cassino ( and introducing many falsehoods ) , he wrote several historical works : `` De viris illustribus Casinensibus '' ; `` De ortu et obitu justorum Casinensium '' ; `` De Locis sanctis '' ; Disciplina Casinensis `` ; '' Rhythmus de novissimis diebus `` . Peter forged , under the name ___MASK41___ Gordian , the Passion ___MASK41___ St . Placidus . He is vain and occasionally untruthful , but an entertaining writer . His works are in Patrologia Latina , CLXXIII , 763 - 1144 . ___MASK53___ is a geographical area in the ___MASK12___ , central Italy , including 37 " comuni " in the province ___MASK41___ L ' Aquila , the most important ___MASK41___ which is Avezzano . It is located between the plain ___MASK41___ the former Lake Fucino , the National Park ___MASK41___ ___MASK12___ , ___MASK75___ and Molise , the plain ___MASK41___ Carsoli and the valley ___MASK41___ Sulmona .