In Acts 17 verses 1 -9 we read that the Jews became enraged with Paul and Silas and found wicked men from the "agora" (our English Bibles say marketplace but the word in the Greek is actually agora meaning town square) causing an uproar and attacking the house of Jason.
And this is the agora in Thessalonika. It was built 1 century before Christ. Only about 1/4 of the agora has been excavated due to lack of financial resources. The idea was for one to walk through the site. There is actually a brand new museum also on the site but the economic crisis hit Greece and there weren't enough funds for this to open properly! So sad!