The compact core of the two figures has a triangular scheme which apex coincides with the two visages cheek to cheek, maximum representation of the virgin’s mercy which, through the Son sacrifice, becomes the Mother of the entire humanity.
As other marble artworks, the dating of this embossing remains unknown: under a stylistic point of view, considering the way it juts out so little and the tendency to stylize the shapes, the most fitting dating would be not before the ‘50s.