St. Catherine Laboure, virgin, was born on May 2, 1806. At an early age she entered the community of the Daughters of Charity, in Paris, France. Three times in 1830 the Virgin Mary appeared to St. Catherine Laboure, who then was a twenty-four year old novice.
On July 18, the first apparition occurred in the community's motherhouse. St. Catherine beheld a lady seated on the right side of the sanctuary. When St. Catherine approached her, the heavenly visitor told her how to act in time of trial and pointed to the altar as the source of all consolation. Promising to entrust St. Catherine with a mission which would cause her great suffering, the lady also predicted the anticlerical revolt which occurred at Paris in 1870.
On November 27, the lady showed St. Catherine the medal of the Immaculate Conception, now universally known as the "Miraculous Medal." She commissioned St. Catherine to have one made, and to spread devotion to this medal. At that time, only her spiritual director, Father Aladel, knew of the apparitions. Forty-five years later, St. Catherine spoke fully of the apparitions to one of her superiors. She died on December 31, 1876, and was canonized on July 27, 1947. Her feast day is November 28.from Wikipedia
Saint Catherine Labouré, D.C.. (May 2, 1806 – December 31, 1876) (born Zoe Labouré) was a member of the Daughters of Charity of Saint Vincent de Paul and a Marian visionary who relayed the request from the Blessed Virgin Mary to create the Miraculous Medal worn by millions of Christians, both Roman Catholic and non-denominational.Source: Catholic Saints and Angels Online