Now in the fifteenth year of the reign of Tiberius Caesar, Pontius Pilate being governor of Judea, and Herod being tetrarch of Galilee, and his brother Philip tetrarch of the region of Ituraea and Trachonitis, and Lysanias tetrarch of Abilene,

 (i) Tiberius was the successor of Augustus and therefore the second of the Roman emperors. As early as A.D. 11 or 12 Augustus had made him his colleague in the imperial power but he did not become sole emperor until A.D. 14. The fifteenth year of his reign would therefore be A.D. 28-29. Luke begins by setting the emergence of John against a world background, the background of the Roman Empire. 