Mother and Son emerge illuminated by the light in the half-light of the room. In the background you can see the thalamus of the Virgin, decorated with a partially raised curtain. The image refers to the mystery of the Incarnation and to the role of co-redemptrix that medieval theology assigned to Mary, who in fact raises the arm of Christ in an act of blessing. But it is the whole spatial and luministic setting of the painting that is charged with a symbolic connotation and transforms the place of the miracle of the Annunciation into a visual metaphor of the very body of Mary. Rare and unexpected is the detail of the cord with the counterweight that was used to close the door: the door that opens here without anyone pushing it can then allude to the mystery of the incarnation, according to an invention as sought after as it is unprecedented, which makes Giulio Romano a worthy heir of Raphael.