This church "San Paolo fuori le mura" - at that time located "in front of the walls" of the city of Rome - was consecrated to Saint Paul, here is his tomb. At first he was an opponent of the Christian movement and was not called to the apostle ministry like the other apostles by Jesus Christ during his lifetime, but was only converted later with the famous "Damascus experience" (see Acts of the Apostles, Chapter 9).
His attribute, with which he is most often depicted in paintings or as a statue, is the sword with which he was executed, such a sentence was a "privilege" under Roman law of the time (quick death rather than a long agonizing one like other types of execution). agony connected) that was due to the citizens of Rome.
Peter (Peter) is also known together with Paul as the "Princes of the Apostles", their common memorial day in the calendar of saints is June 29th.