Answer:
Rome is a gentile nation and Paul is an Apostle for the Gentiles to preach the Gospel to them so that those whom God is calling( saints) among the Gentiles, liked Cornelius ( acts 10) can come to God.
Step-by-step explanation:
Acts 28: 25- 28, Paul announced to the Jews because there are those who will not hear the Gospel according to Isaiah, that the salvation of God was sent to the Gentiles and they will hear.