At this church in Winnipeg, Artist, John Collier has created this bas-relief of Our Lady  (Mary) emerging from the wall and crushing the head of Satan in the form of a serpent, and also waiving across the transept to St. Gianna their patron saint. John Collier also created the full sculpture of St. Gianna Beretta Molla. You can see his depiction of St. Gianna on his sculpture page, HERE.  (Scroll down; she is on the right)

By her emerging from the wall, Our Lady signifies that she is the barrier protecting, while also embracing, the whole congregation.