Touring Turkey / Tarsus:

"... 'Let us go back and visit the brothers in all towns where we preached the word of the Lord and see how they are doing' said the tent-maker Paul to Barnabos, when they were in Antioch ..."

Paul, calling himself as 'Apostle to the Gentiles', was the most notable of early Christian missionaries. Unlike the Twelve Apostles, Paul never met Jesus; according to the 'Acts of the Apostles', his conversion took place while he was traveling the road to Damascus. He experienced a vision of the resurrected Jesus after which he was temporarily blinded. Paul asserts that he received the Gospel not from man, but by 'the revelation of Jesus Christ'.
Paul's influence on Christian thinking has been more significant than any other New Testament author. Fourteen epistles in the New Testament are attributed to Paul.

His mission can be divided based on geography.
In mid-30s, he is centered at Damascus.
Late 30s to late 40s, Paul is based around Antioch.
Late 40s to late 50s, he is travelling mostly around the Aegean.
Then comes the final portion of Paul's life... his arrest and journey to Rome.

Paul writes in his letter to the Romans:
"... For we maintain that a man is justified by faith apart from observing the law. Is God the God of Jews only? Is he not the God of Gentiles too? Yes, of Gentiles too, since there is only one God, who will justify the circumcised by faith and the uncircumcised through that same faith ..." (Romans 3:28-30).

This means that Gentiles don't need to become Israelites when they convert to Christianity, because God is not just the God of one nation... you do not need to be Jewish to be a "follower of Jesus"; a Christian.

St. Paul; 'the most devoted', was born in Tarsus.