Queenship of Mary

"Because the virgin Mary was raised to such a lofty dignity as to be
the mother of the King of kings, it is deservedly and by every right
that the Church has honored her with the title of 'Queen'."
(St Alphonsus Liguori)

Check out Pope Pius XII's encyclical "Ad Caeli Reginam"

Image Source:
Raphael, The Crowning of the Virgin (Oddi Altarpiece)
1502-03
Oil on canvas