BERTOLDO di REICHENAU. — Chronicler, who, according to the testimony of Bernoldo di Costanza, died on 12 March 1088, at an advanced age. A disciple of Ermanno Contratto, he was a monk of the abbey of Reichenau, on Lake Constance. He continued Ermanno’s chronicle from 1054, the year in which it had been interrupted, to 1080, prefacing his work with a detailed biography of his master. The Bertholdi Annales, not free from errors, no longer exist in the original manuscript, but only in copies of it; they have been published in MGH, Scriptores, V, v, pp. 264–326, and in PL 147, 339–442.
BIBL.: J. Richter, Die Chroniken Bertholds und Bernolds, Cologne 1862; A. Potthast, Bibliotheca historica Medii Aevi, I, 2nd ed., Berlin 1896, p. 158; A. Fliche, La réforme grégorienne, II, Leuven 1926, pp. 39–43. Emma Santovito