The hierarchy of the Catholic Church refers to the ordered body of ordained ministers—bishops, priests, and deacons—instituted by Christ to pastor his people. The word comes from the Greek hierarchia, meaning "sacred origin" or "sacred rule" (CCC 873).
A Ministry of Service
Christ instituted the ecclesiastical hierarchy with the mission of feeding the People of God in his name. The hierarchy is not intended for the domination or exaltation of its members, but for the service and unity of the entire Church. The Pope and the bishops in communion with him exercise this authority through teaching, sanctifying, and governing (CCC 873–874).
May the Lord bless you and keep you.