The record in Acts 17 tells us when the apostle Paul came to the city of Athens he was moved in seeing the city given to idolatry.  He disputed with the people throughout the city, on the street corners and in the marketplace.  Certain philosophers heard him and brought him to Mars Hill.  It was here that men spent their time at nothing else except to tell or hear some new thing.  Paul began his discourse by observing that they were very religious and worshipped many gods.  He was interested in revealing unto them the nature of the true God in contrast to false gods – to declare unto them the “unknown God.”