In Perga - See the notes on Acts 13:13.
They went down into Attalia - “Attalia had something of the same relation to Perga which Cadiz has to Seville. In each case the latter city is approached by a river voyage, and the former is more conveniently placed on the open sea. Attalus Philadelphus, king of Pergamus, whose dominions extended from the northwestern corner of Asia Miner to the Sea of Pamphylia, had built this city in a convenient position for commanding the trade of Syria or Egypt. When Alexander the Great passed this way, no such city was in existence; but since the days of the kings of Pergamus, who inherited a fragment of his vast empire, Attalia has always existed and flourished, retaining the name of the monarch who built it. Its ancient site is not now certainly known” (Life and Epistles of Paul, vol. i. pp. 200, 201). It is probable that it is the modern Satalia.