Note 8 at Acts 13:4: Seleucia was a city on the seacoast of Syria about 20 miles from Antioch. It served as the seaport for Antioch. Barnabas and Saul are not mentioned as preaching in Seleucia, presumably because it had already been evangelized by the believers in Antioch, and Saul had a desire to preach Christ to those who had not heard (Rom. 15:20).