Now while Paul waited for them at Athens, his spirit was provoked within him when he saw that the city was given over to idols. 17 Therefore he reasoned in the synagogue with the Jews and with the Gentile worshipers, and in the marketplace daily with those who happened to be there. 18 Then certain Epicurean and Stoic philosophers encountered him. And some said, “What does this babbler want to say?”
Others said, “He seems to be a proclaimer of foreign gods,” because he preached to them Jesus and the resurrection.
19 And they took him and brought him to the Areopagus, saying, “May we know what this new doctrine is of which you speak? 20 For you are bringing some strange things to our ears. Therefore we want to know what these things mean.” 21 For all the Athenians and the foreigners who were there spent their time in nothing else but either to tell or to hear some new thing. — Acts 17:16-21.
As Paul waits for his co-workers in Athens, he witnesses in the synagogue, and is provoked by idolatry to go and preach the gospel in the market place each day. This causes people to take him to the Areopagus, an Athenian public speaking area, where people share their thoughts and philosophies.