To read about the conversion of Cornelius the Centurion click on the link below.

No, Cornelius was not Greek. He is described in the Bible as a Roman centurion stationed in Caesarea who converted to Christianity after a divine vision.

Cornelius was a Roman centurion who is considered by Christians to be the first Gentile to convert to the faith, as related in Acts of the Apostles.

If I understand your question correctly, you'll find Peter going to the household of the Roman centurion Cornelius in Acts 10.