Gregory the Great
Catena Aurea · Lukasevangelium 3
Lk 3, Verses 1–2English original
Now in the fifteenth year of the reign of Tiberius Cæsar, Pontius Pilate being governor of Judæa, and Herod being tetrarch of Galilee, and his brother Philip tetrarch of Ituræa and of the region of Trachonitis, and Lysanias the tetrarch of Abilene, Annas and Caiaphas being the High Priests, the word of God came unto John the son of Zacharias in the wilderness.
Because John preached Him who was to be at the same time both King and Priest, Luke the Evangelist has marked the time of that preaching by the mention not only of Kings, but also of Priests. As it follows, Under the High Priests Annas and Caiaphas.