ISB ~ Romans 1 v8

in all the world:The Church in Rome was already admired the world over as a living exemplar of Christian faith (16:19). Its reputation continued to grow as Peter and Paul ministered to the Roman Church and were martyred there in the mid 60s. This led the early Christians to shift their attention from Jerusalem to Rome as the new center of apostolic authority and tradition. See note on Acts 12:17.