Holy Orders

Holy Orders is the sacrament through which the mission entrusted by Christ to his apostles continues to be exercised in the Church until the end of time: thus it is the sacrament of apostolic ministry.  It includes three degrees: episcopate (Bishops), presbyterate (Priests), and diaconate (Deacons).

Catechism of the Catholic Church §1536
 

Diocese of St. Augustine Vocations