The bishops, who possess the fullness of orders, and therefore the fullness of both priesthood and diaconate, are as a body (the College of Bishops) considered the successors of the Apostles[15][16] and are "constituted Pastors in the Church, to be the teachers of doctrine, the priests of sacred worship and the ministers of governance"[17] and "represent the Church."[18] In the year 2012, there were 5,133 Catholic bishops;[19] at the end of 2014, there were 5,237 Catholic bishops.[20] The Pope himself is a bishop (the bishop of Rome) and traditionally uses the title "Venerable Brother" when writing formally to another bishop.