Woman of the Apocalypse
Beatified figures, not yet canonised as saints, are sometimes shown in medieval Italian art with linear rays radiating out from the head, but no circular edge of the nimbus defined; later this became a less obtrusive form of halo that could be used for all figures. Mary has, especially from the Baroque period onwards, a special form of halo in a circle of twelve stars, derived from her identification as the Woman of the Apocalypse.