We still have records of what happened at Nicaea. Basically they standardised the date of Easter and condemned Arianism (against the will of Constantine who wan

We still have records of what happened at Nicaea. Basically they standardised the date of Easter and condemned Arianism (against the will of Constantine who wanted a compromise position). The Council of Nicaea actually didn't have anything to do with the Bible, despite what a lot of people say. By that point the Church had more or less reached a consensus on the canon after a couple hundred years of debate.