lol. So this is just some "stone support?" Are you kidding?
This travesty is outside the main Mary basilica in Rome (Santa Maria Maggiore.)
For your further education, check out the following quotes from Vatican II...
Taken up to heaven she did not lay aside this saving office but BY HER MANIFOLD INTERCESSION CONTINUES TO BRING US THE GIFTS OF ETERNAL SALVATION. By her maternal charity, she cares for the brethren of her Son, who still journey on earth surrounded by dangers and difficulties, until they are led into their blessed home. Therefore the Blessed Virgin is invoked in the Church under the titles of ADVOCATE, HELPER, BENEFACTRESS, and MEDIATRIX (Dogmatic Constitution on the Church, chap. 8, II, 62, pp. 382-383). As St. Irenaeus says, she being obedient, became the cause of salvation for herself and for the whole human race. Hence not a few of the early Fathers gladly assert with him in their preaching ... death through Eve, LIFE THROUGH MARY. This UNION OF THE MOTHER WITH THE SON IN THE WORK OF SALVATION is made manifest from the time of Christs virginal conception up to his death (Dogmatic Constitution on the Church, chap. 8, II, 56, pp. 380-381).
Repent.
According to you, that combination of statues indicates that Catholics believe the Blessed Virgin Mary and the Christ Child joined Christ on the cross at Calvary.
Three people on the cross, including two Christs.
Riiiight.