<P> Since the end of the 4th century, the title "Fathers of the Church" has been used to refer to a more or less clearly defined group of ecclesiastical writers who are appealed to as authorities on doctrinal matters . Orthodoxy of doctrine, holiness of life, approval by the Church and antiquity are traditionally considered conditions for classification as a Father of the Church, but modern writers sometimes include Tertullian, Origen and a few others . </P> <P> The earliest Christian writings (other than those collected in the New Testament) are a group of letters credited to the Apostolic Fathers . These include the Epistle of Barnabas, the Shepherd of Hermas and the Epistles of Clement, as well as the Didache . Taken as a whole, the collection is notable for its literary simplicity, religious zeal and lack of Hellenistic philosophy or rhetoric . Fathers such as Ignatius of Antioch (died 98 to 117) advocated the authority of the apostolic episcopacy (bishops). </P> <P> Early Christianity spread from city to city throughout the Hellenized Roman Empire and beyond into East Africa and South Asia . The Christian Apostles, said to have dispersed from Jerusalem, traveled extensively and established communities in major cities and regions throughout the Empire . Apostles (see Apostolic see) and other Christian soldiers, merchants, and preachers founded early church communities in northern Africa, Asia Minor, Armenia, Caucasian Albania, Arabia, Greece, and other places . Over forty existed by the year 100, many in Asia Minor, such as the seven churches of Asia . By the end of the 1st century, Christianity had spread to Greece and Italy, even India . </P> <P> By 201 AD or earlier, under King Abgar the Great, Osroene became the first Christian state . </P>

Where did christianity spread during the first 300 years
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