"The Spread Of Christianity"

The history of early Christianity spans from the death of Jesus Christ (c.26-36) to the First Council of Nicaea in 325.

The first part of the period, during the lifetimes of the Twelve Apostles, is traditionally believed to have been initiated by the Great Commission of Jesus (though some scholars dispute its historicity), and is called the Apostolic Age. The earliest followers of Jesus composed an apocalyptic, Second Temple Jewish sect, which historians refer to as Jewish Christianity. Though Paul's influence on Christian thinking is said to be more significant than any other New Testament author, the relationship of Paul of Tarsus and Judaism is still disputed today. Early Christianity gradually grew apart from Judaism during the first two centuries and established itself as a predominantly gentile religion in the Roman Empire.

In the Ante-Nicene Period (literally before the First Council of Nicaea in 325), following the Apostolic Age, both incredible diversity and unifying characteristics lacking in the apostolic period emerged simultaneously. Part of the unifying trend was an increasingly harsh rejection of Judaism and Jewish practices. By the beginning of the Nicene period, the Christian faith had spread throughout Western Europe and the Mediterranean Basin, and to North Africa and the East, see Early centers of Christianity.

The First Council of Nicaea in 325 and the promotion of Christianity by Emperor Constantine I in the Roman Empire are commonly used to mark the end of early Christianity, beginning the era of the first seven Ecumenical Councils.