On this day in 325, the First Council of Nicaea was called to order. Emperor Constantine’s idea of summoning all the bishops to a big meeting to settle the little difficulties in the Church proved a roaring success; and ever since then, whenever a small disagreement arises among Christians, a formal meeting is called, and everything is soon put to rights. Since Nicaea, however, it has become traditional for the council fathers to remove their halos for the group portrait, so that the bishops in the back rows are not obstructed.