Berthold of Zwiefalten (c. 1089 – 21 May 1169) was a German Benedictine monk who thrice served as abbot of Zwiefalten Abbey and wrote its early history.
[2] It was during the years 1137–38 that Berthold wrote the Latin Libellus (or Liber) de constructione Zwivildensis monasterii (Book on the Construction of Zwiefalten Monastery) as a continuation of the chronicle begun by Ortlieb of Zwiefalten, although it appears to have stemmed from a dispute between the two men.
[3] At places, the Libellus is written more like a tract against the Emperor Henry IV.
It draws on the chronicles of Bernold of Constance, Bonizo of Sutri, Ekkehard of Aura and Frutolf of Michelsberg as sources for these years.
[2] Berthold was elected abbot in 1139, but was forced resign in 1141 after being accused of misuse of monastic property.