Catholic theology
Catholic belief holds that the church exists both on earth and in heaven simultaneously, and thus the Virgin Mary and the saints are alive and part of the living church. Prayers and devotions to Mary and the saints are common practices in Catholic life. These devotions are not worship, since only God is worshiped. The church teaches that the saints "do not cease to intercede with the Father for us. ... So by their fraternal concern is our weakness greatly helped."
Queen of Heaven
The Catholic faith states, as a dogma, that Mary is assumed into heaven and is with Jesus Christ, her divine son. Mary should be called Queen, not only because of her Divine Motherhood of Jesus Christ, but also because God has willed her to have an exceptional role in the work of eternal salvation. Roman Catholicism employs the liturgical Latin phrase "Ora Pro Nobis", meaning "pray for us", and does not teach adherents to worship saints, but rather ask (asking is a form of prayer) those saints to pray for them. The encyclical "Ad Caeli Reginam" maintains that Christ as redeemer is Lord and King. The Blessed Virgin is Queen, because of the unique manner in which she assisted in our redemption, by giving of her own substance, by freely offering Him for us, by her singular desire and petition for, and active interest. Mary was chosen Mother of Christ so she might help fulfill God's plan in the redemption of humankind; The Catholic Church from the earliest times venerated the Queen of Heaven, according to Pius XII:
The Queenship of Mary is commemorated in the last of the Glorious Mysteries of the Holy Rosary—the Coronation of the Virgin as Queen of Heaven and Earth.