Mondsichelmadonna
The 12 stars represents God's 12 Greatest Seraphim Angels assigned to protect the Blessed Virgin Mary as described by Saint Catherine Laboure in 1830 when she was ordered by God to strike the Medal of the Immaculate Conception aka "The Miraculous Medal". A circle of stars often represents unity, solidarity and harmony in flags, seals and signs, and is also seen in iconographic motifs related to the Woman of the Apocalypse as well as in Baroque allegoric art that sometimes depicts the Crown of Immortality.