<P> Thessaloniki , the major northern Greek city where it is believed Christianity was founded by Paul , thus an Apostolic See , and the surrounding regions of Macedonia , Western and Eastern Thrace , and Epirus , which also extend into the neighboring Balkan states of Albania and Bulgaria , were early centers of Christianity . Of note are Paul 's Epistles to the Thessalonians and to Philippi , which is often considered the first contact of Christianity with Europe . The Apostolic Father Polycarp wrote a letter to the Philippians , c. 125 . </P>
<P> Thessaloniki , the major northern Greek city where it is believed Christianity was founded by Paul , thus an Apostolic See , and the surrounding regions of Macedonia , Western and Eastern Thrace , and Epirus , which also extend into the neighboring Balkan states of Albania and Bulgaria , were early centers of Christianity . Of note are Paul 's Epistles to the Thessalonians and to Philippi , which is often considered the first contact of Christianity with Europe . The Apostolic Father Polycarp wrote a letter to the Philippians , c. 125 . </P>
the site of the first european missionary activity was the principal city of
the site of the first european missionary activity was the principal city of
Philippi
Philippi