Peter the Deacon
(813 words)

[Petrus Diaconus]

1107/10 – after 1159. Italy. Monk, archivist and librarian in Montecassino. Author of a continuation and re-working of the Leo of Ostia, and thus a contributor to the Latin Chronica monasterii Casinensis.

Peter was born between 1107 and 1110 and was a descendant of the noble family of the Earl of Tusculum, if the information he gives can be believed. He entered the Montecassino monastery as puer oblatus in 1115 at the age of five. After the dismissal of his patron, Abbot Oderisius III, Peter had to leave the monastery in 1128 and spent the next …

Cite this page
Becker, Julia, “Peter the Deacon”, in: Encyclopedia of the Medieval Chronicle, Edited by: Graeme Dunphy, Cristian Bratu. Consulted online on 20 November 2018 <>
First published online: 2016

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