The Miraculous Medal (French: Médaille miraculeuse), also known as the Medal of Our Lady of Graces, is a devotional medal,
the design of which was originated by Catherine Labouré following her apparitions of the Blessed Virgin Mary in the Chapel of Our Lady of the Miraculous Medal of Paris, France.

The elements of the design encapsulate major Marian teachings that have been declared doctrine by the Catholic Church.
Front side:
Mother – her open arms, the "recourse" the faithful have in her
Immaculate – the words, "conceived without sin"
Assumed into Heaven – she stands on the globe, Queen of Heaven and Earth
Mediatrix – rays from her hands symbolizing graces
Protectrix – crushes the serpent underfoot to proclaim that Satan and all his followers are helpless before her(Genesis 3:15).
Reverse side:
The large letter "M" for Mary
Cross and bar – Jesus Christs' cross of redemption for mankind. The interlacing of the M and the cross shows Mary's close involvement with her son.
12 stars – the twelve apostles and the vision of Saint John in Revelation 12:1: "And a great sign appeared in heaven: A woman clothed with the sun, and the moon under her feet, and on her head a crown of twelve stars."
Left heart – the Sacred Heart of Jesus, Who died for the sins of mankind
Right heart – the Immaculate Heart of Mary, who intercedes for sinners
Flames above both hearts – the burning love both Jesus and Mary have for all people