International audienceThe research presented here is situated in the continuation of the discovery, in 1996, of a Hildegard of Bingen's Vita in French, preserved in three 15th century manuscripts, Cambrai, Bibl. Mun., 812, Douai, Bibl. Mun., 869 and Lille, Bibl. Mun., 453 ( 383 ). Deepening her investigation about this text, the author bends in detail over the relations uniting those three codices, and goes deeply into the question of its sources. Several Latin texts having inspired the French Life may be identified, in particular the Octo lectiones in festo S. Hildegardis composed by Theoderich of Echternach, which propose an abbreviated Vita of the nun for a liturgical reading on the saint's day, September 17th. Another important and unpu...