sentences:  It is sometimes subject of episcopal genealogy.In certain Christian denominations with well-documented ties to the history of Christianity as a whole, it is held that only a person in apostolic succession, a line of succession of bishops dating back to the Apostles, can be a valid bishop; can validly ordain priests, deacons and bishops; and can validly celebrate the sacraments of the church.These churches are the Roman Catholic Church, the Eastern Orthodox Church, the Eastern Rite Catholic Church, the Oriental Orthodox Church, the Church of Sweden (Lutheran), the Evangelical Lutheran Church of Finland, the Old Catholic Church, the Moravian Church, the Independent Catholic Churches, the Anglican Communion, and the Assyrian Church of the East.