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Leonie was born September 16, 1844, in Sezanne, France.
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She attended the Visitation convent school at Troyes when she was eleven
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on October 11, 1871, she professed first vows in the new congregation she co-founded with Father Brisson called the Oblate Sisters of Saint Francis de Sales
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She died on January 10, 1914
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She was canonized in 2001 and is the most recently canonized member of the Salesian family
Her feast day is on January 10th