Centurion, first Gentile converted to Christianity
From Lesser Feasts and Fasts 2000:
The author of Acts considered Cornelius’ conversion very momentous for the future of Christianity. He records that it occurred as the result of divine intervention and revelation, and as a response to the preaching of Peter the chief apostle. The experience of Cornelius’ household was regarded as comparable to a new Pentecost, and it was a primary precedent for the momentous decision of the apostolic council, held in Jerusalem a few years later, to admit Gentiles to full and equal partnership with Jewish converts in the household of faith.
