Miraculous medal in gilded silver, without chain. The Miraculous Medal is the most widespread medal in the world. Commissioned by the Virgin Mary, appeared in St. Catherine Labourè in the convent of Paris on Rue du Bac; the Madonna herself described how the coinage of the medal itself should have been; rich in symbols and meaning, the miraculous medal, through the intercession of Mary, gives the wearer many thanks with faith.