Luke records, in the book of Acts, an important historical event involving Paul during the 18 months he worked at Corinth
12 But when Gallio was proconsul of Achaia, the Jews made a united attack on Paul and brought him before the tribunal,
13 saying, “This man is persuading people to worship God contrary to the law.”
14 But when Paul was about to open his mouth, Gallio said to the Jews, “If it were a matter of wrongdoing or vicious crime, O Jews, I would have reason to accept your complaint.
15 But since it is a matter of questions about words and names and your own law, see to it yourselves. I refuse to be a judge of these things.”
16 And he drove them from the tribunal.
17 And they all seized Sosthenes, the ruler of the synagogue, and beat him in front of the tribunal. But Gallio paid no attention to any of this. (Acts 18:12-17 ESV)
The photo below shows the actual platform or bema mentioned in Acts 18. Popular English versions use the terms tribunal, judgment seat, place of judgment, or judge’s bench.
The bema dates to A.D. 44, but could be as early as the time of Augustus (Murphy-O’Connor, St. Paul’s Corinth, 28).
An inscription found at Delphi names Gallio the proconsul of Achaia. Gallio was the brother of the famous Roman Stoic philosopher Seneca. Gallio’s terms as proconsul of Achaia is usually dated to either A.D. 51/52 or 52/53. This is an important chronological help in our study of Paul’s journeys. In the largest fragment of the inscription, the name of ΓΑΛΛΙΩ (GALLIO) may be seen in the center of the third line from the top.
I have been to Delphi at least two times, but the broken pieces of the Gallio Inscription were in a storage room. I did have written permission to see the fragment, but the slides I made were of poor quality. Thanks to David Padfield for permission to use the nice photo above which is now displayed in the museum at Delphi.