Got about half of these, in spite of some of the clues being a little iffy. Others I knew but blanked on, including the island question which just came up in a front page quiz a few days ago. Some I wasn't sure about. Much harder than most of the religion quizzes on the site.
The Council of Nicea, consisting of men, whether established 1700 years or 17,000 years ago, does not trump the word of Jesus himself, who denied being co-equal to the Father; e.g. - if equal, exactly who was Jesus praying to in the garden when the Roman came to arrest him?