Acts 10 narrates the exciting history of how the door of faith was opened to the Gentiles. The Apostle Peter was directed to leave Joppa and go up the coast to Caesarea where he would find a man with an honest and good heart, Cornelius the Roman Centurion, as well as his relatives and close friends.
Peter, who had the “keys of the kingdom of heaven,” had preached to the Jews first on the Day of Pentecost (Acts 2), and was then privileged to preach to the Gentiles in Acts 10. Peter began by saying, “Opening his mouth, Peter said: “I most certainly understand now that God is not one to show partiality, but in every nation the man who fears Him and does what is right is welcome to Him” (Acts 10:34-35, NASB). Cornelius and those present heard “words by which you and all your household will be saved” (Acts 11:14, CSB). They were receptive to and obedient to the faith!
From this new beginning the gospel would go on to include Gentiles in Antioch (Acts 11), and on to the uttermost part of the earth (Acts 1:8; cf. Acts 13-28, etc.).
We have several posts on Caesarea, including here, here, and here.