First Council of Nicaea

=== Presiding officer ===
“The evidence weighs strongly in favour of the view that Ossius … presided at Nicaea.”<ref name=":0">Hanson RPC, The Search for the Christian Doctrine of God: The Arian Controversy, 318-381. 1988, page 154</ref> “In normal circumstances the Metropolitan of the area in which the Council met would have presided, and in this case it would have been Eusebius of Nicomedia.”<ref>Hanson RPC, The Search for the Christian Doctrine of God: The Arian Controversy, 318-381. 1988, page 155</ref> Ossius was “Constantine's chief adviser and agent in matters concerning the Christian church.”<ref>Hanson RPC, The Search for the Christian Doctrine of God: The Arian Controversy, 318-381. 1988, page 130</ref> Ossius presided “as the Emperor's representative”<ref name=":0" /> and as Constantine’s “agent.”<ref>Hanson RPC, The Search for the Christian Doctrine of God: The Arian Controversy, 318-381. 1988, page 190</ref> “Ossius … represented the policy of Constantine”<ref>Hanson RPC, The Search for the Christian Doctrine of God: The Arian Controversy, 318-381. 1988, page 170</ref>