Life of Louis the Pious
Teganus's account of the life of Emperor Louis the Pious, recording that Charlemagne near death corrected the four Gospels against Greek and Syriac texts.
Preface and Praise of Sacred Scripture
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Chapter IV: The Judgments and Examples of the Fathers
— Teganus cited: Charlemagne near death corrected the Gospels against Greek and Syriac texts
"Teganus in the Life of Louis attests that Charlemagne near death, having crowned his son Louis at Aachen, gave himself entirely to prayers, almsgiving, and the sacred Letters"