The Apostle Paul came to Philippi on his second preaching journey. Luke accurately describes the city with these words:
So putting out to sea from Troas, we ran a straight course to Samothrace, and on the day following to Neapolis; and from there to Philippi, which is a leading city of the district of Macedonia, a Roman colony; and we were staying in this city for some days. (Act 16:11-12 NAU)
The photo below shows ruins of the forum (or agora) of the city where much of the activity took place. Portions of the famous Egnatian Way may be seen at the edge of the forum, but partially buried under the earth and modern road on the right. [See correction here.]
The Forum (Agora) of Philippi. Photo by Ferrell Jenkins.
At Philippi, Paul preached to and baptized Lydia and her household, and the jailer.
Ferrell's Travel Blog 
I just love your posts Ferrell, I always read them. Thanks and keep on the good work.
But isn’t the Agora on the other side of the road, on the left side outside this picture?
EW