Councils of Ephesus:
Ephesus is another destination in our time travel. Because it was the another destination on Christianity history. The calendar was in AD 431 and the first council was held in Church of Mary. Another one was held in AD 449.
It was presided by Emperor Theodosius II. They were about the decision of Easter day and the rebellion of some priests including Flavian, the patriarch of Constantinople.
They were important conflicts on Christianity.