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."
Christian denomination
One central tenet of Catholicism (which is a common point between Roman Catholic, Anglican, Eastern Orthodox, and some other Churches), is its practice of apostolic succession. "Apostle" means "one who is sent out". Jesus commissioned the first twelve apostles (see Biblical Figures for the list of the Twelve), and they, in turn laid hands on subsequent church leaders to ordain (commission) them for ministry. In this manner, Roman Catholics and Anglicans trace their ordained ministers all the way back to the original Twelve.