Short answers, pulled from the story.
Christianity emerged as a movement of Judaism in Roman Judea during the 1st century AD. Jesus proclaimed the coming of the Kingdom of God to his followers before his death by crucifixion.
The Antioch church is believed to be where the term Christian was coined. Edessa became the principal center of Syriac-speaking Christianity from apostolic times.
On the 27th of February 380, the Roman Empire officially adopted Trinitarian Nicene Christianity as its state religion. Prior to this date, Constantius II and Valens had personally favored Arian or Semi-Arian forms of Christianity.
Wulfila became the first bishop of the Christian Goths in 337 or 341. Between 348 and 383, Wulfila translated the Bible into the Gothic language.
In 325, Constantine summoned the Council of Nicaea which issued the Nicene Creed. The Church of the East endorsed the doctrine of Nestorius following the condemnation of Nestorius for heresy at the First Council of Ephesus.