Catherine Labouré, DC (May 2, 1806 – December 31, 1876) was a French member of the Daughters of Charity of Saint Vincent de Paul and a Marian visionary.

She is believed to have relayed the request from the Blessed Virgin Mary to create the Miraculous Medal, now worn by millions of people around the world.

Later, her father, wishing to deter her from her religious vocation, sent her to Paris to work in his brothers’ eating establishment for poor workers.

On three successive evenings, upon returning from the church to the Rue du Bac, Catherine reportedly experienced, in the convent chapel, a vision of what she took to be the heart of St. Vincent above a shrine containing a relic from his right arm.

[7] Labouré stated that on July 19, 1830, the eve of the feast of St. Vincent de Paul, she woke up after hearing the voice of a child calling her to the chapel, where she heard the Virgin Mary say to her, "God wishes to charge you with a mission.

"[8] Labouré did so, and after two years of investigation and observation of her normal daily behavior, the priest took the information to his archbishop without revealing her identity.

[10] The dogma of the Immaculate Conception had not yet been officially promulgated, but the medal, with its "conceived without sin" slogan, was influential in popular approval of the idea.

Immediately after taking her vows, Labouré was sent to the Hospice d'Enghien, located in the village of Reuilly, which, at the time, was slightly outside the city limits of Paris.

Her body was later moved and is now encased in glass beneath the side altar in the Chapel of Our Lady of Graces of the Miraculous Medal in 140 Rue du Bac, Paris.

[14] Labouré's feast day is observed on November 28 according to the liturgical calendar of the Congregation of the Mission, the Daughters of Charity of Saint Vincent de Paul and the Roman Catholic Archdiocese of Paris.