Machine translation of the 1948–1954 Italian original. The original text is authoritative.
LEONE MARSICANO, called LEONE OSTIENSE. — Benedictine, cardinal-bishop of Ostia, born in the territory of the Marsi ca. 1060, died 22 March 1115.
At the age of 14 he entered the monastery of Montecassino, where he was received by Abbot Desiderio, who introduced him to the study of the Sacred Scriptures and appointed him librarian of the monastery.
At the order of Abbot Oderisio he wrote, in three books, a Chronica monasterii Castinensis, from s. Benedetto to Abbot Desiderio, later Pope Vittore III (1086–87), whose life from chap. 34 of book III was continued by Pietro Diacono (1st ed., Venice 1513, but incomplete; the 1st complete ed., Paris 1668, reproduced by L. Muratori, in RIS, IV,
(from A. Graber, L'Empereur dans l'art hyacinth, Paris 1936, pl. 25) LEONE VI, EMPEROR OF THE EAST, called the WISE — Coronation. Marble frieze (10th century) — Berlin, Friedrich Museum.Milan 1723, pp. 151–628 and in MGH, Script., VII, 574 ff.). He also wrote Vita s. Mennatis. Pietro Diacono also mentioned his Sermones and Historia peregrinarum.
BIBL.: U. Balzani, Le cronache ital. nel Medio Evo, Milan 1900, pp. 158–66; W. Smidt, Über den Verfasser der drei letzten Redakt. der Chronik Leos von Monte Cassino, in Papsttum u. Kaisertum... P. Kehr zum 65. Geburtstag dargebracht, Munich 1926, pp. 263–86; G. Leidinger, Der eodes lat. manac. 4623 (Chronik des Leo Mars.), in Casinesia, II, Montecassino 1929, pp. 365–68; H. W. Klewitz, Petrus Diaconus u. die Montecassiner Klosterchronik des Leo von Ostia, in Archiv für Urkundenforschung, 14 (1935), pp. 414–53; W. Smidt, Die vermeintl. u. die virkl. Urgestalt der Chronik Leos V. Montecassino, in Quell. u. Forsch. aus ital. Arch. u. Biblioth., 28 (1938), p. 287 ff.; B. de Gaiffier, Translations et miracles de St Menus par Léon d'Ostie et P. de Mont-Cassin, in Anal. Boll., 62 (1944), pp. 5–32. Felice da Mareto
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“LEONE MARSICANO, DETTO LEONE OSTIENNE.” Enciclopedia Cattolica, vol. VII (1951), p. 689. Azione Romana digital edition, https://azioneromana.com/article/leone-marsicano-detto-leone-ostienne.
