This sculpture is by Antonio Canova from 1809.
This sculpture is based on legends and not backed by the New Testament, but represents Mary in the desert, repenting for her sins. This sculpture also would have included a cross, symbolizing the Crucifixion.
MARY MAGDALENE, FIRST RESURRECTION WITNESS (jesus-story.net) – I haven’t verified the quality of the information on this website, but it does speak about Mary Magdalene.
