Images of the Blessed Virgin Mary and the Infant Jesus have been revered by Christians from ancient times. The reverence for the image is directed to the persons represented. Crowing a statue of the Lord's Mother is symbolic of the honor we give her as the one chosen by God to bear His Son, our Salvation.
During the Month of May - a month both named for and dedicated to Mary - Catholics have long honored her by placing a crown on her image. The tradition in the United States and many other countries has been for school children to have a "May Crowning" ceremony, with a procession, pretty dresses and a wreath of fresh flowers that one child gets to place on the statue. A song for these festivals, "Bring Flowers of the Fairest", with its refrain "O Mary, we crown these with blossoms today, Queen of the Angels, Queen of the May..." has been a familiar favorite for generations.