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St Ivo
(c. 1040—1115)
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(c.1040–1115),
Bp. of Chartres from 1090. He was the most learned canonist of his age, and his three treatises, the Collectio Tripartita, the Decretum, and the Panormia, exercised a determining influence on the development of canon law. Feast day, 20 or 23 May.
