Guest comment:
My friend and colleague John Gee presents a timely observation on the difficulties of drawing conclusions from the absence of archaeological data.
http://fornspollfira.blogspot.com/2015/06/the-archaeology-of-council-of-nicaea.html
I should note that there is far more epigraphic evidence from Nicaea than there is for all of Preclassic Mesoamerica (= period of the Book of Mormon).