Paul is tried before Gallio.
Paul starts his Second Missionary Journey in about 50 AD. He eventually arrives in Corinth after teaching in Asia and Macedonia. There he meets Priscilla and Aquila, and seemingly works with them for a period of time. He lives in Corinth for about the last eighteen months of the journey.
His time in Corinth was very fruitful. He established a church, converted Priscilla and Aquila, and wrote 1 and 2 Thessalonians. He also converted two leaders of the synagogue named Crispus and Sosthenes, as well as other Jews and God Fearers who worshiped at the synagogue.
The Jews got fed up with Paul and brought him before Gallio, the proconsul of Achaia (Greece). They charged Paul with teaching about God in a way contrary to the law, but Gallio chose to interpret the charges to mean that Paul’s teaching was contrary to the Laws of Moses, not the laws of Rome. Therefore, he dismissed the charges because that was not his problem; he didn’t care about the infighting of the Jews concerning their religious interpretations.
Scripture References: Acts 18:12-17