Mass Reading 1: Rv 11:19a; 12:1-6a, 10ab
God's temple in heaven was opened, and the ark of his covenant could be seen in the temple.
A great sign appeared in the sky, a woman clothed with the sun, with the moon under her feet, and on her head a crown of twelve stars. She was with
child and wailed aloud in pain as she labored to give birth. Then another sign appeared in the sky; it was a huge red dragon, with seven heads and ten horns, and on its heads were seven diadems. Its tail swept away a third of the stars in the sky and hurled them down to the earth. Then the dragon stood before the woman about to give birth, to devour her child when she gave birth. She gave birth to a son, a male child, destined to rule all the nations with an iron rod. Her child was caught up to God and his throne. The woman herself fled into the desert where she had a place prepared by God.
Then I heard a loud voice in heaven say: "Now have salvation and power come, and the Kingdom of our God and the authority of his Anointed One."
Reflection on the Reading
From the earliest days of the Church, "The woman clothed with the Sun" has been a clear reference to Mary, the Mother of God and "Queen of Heaven". "The Immaculate Virgin, preserved free from all stain of original sin, when the course of her earthly life was finished, was taken up body and soul into heavenly glory, and exalted by the Lord as Queen over all things, so that she might be the more fully conformed to her Son, the Lord of lords and conqueror of sin and death. The Assumption of the Blessed Virgin is a singular participation in her Son's Resurrection and an anticipation of the resurrection of other Christians" (966 CCC).
As seen by this reading from the book of Revelation, Mary's "Queenship" has its roots in Sacred Scripture. In addition to this passage, Mary's Queenship can also be noticed in the Annunciation, when Gabriel announced that Mary's Son would receive the throne of David and rule forever. How could a Son be King if His Mother was not a Queen? Overall, Mary's Queenship is a share in Christ's Kingship.
For more on Mary’s Queenship: https://www.americancatholic.org/features/saints/saint.aspx?id=1115