See, e.g. Lutheran–Orthodox Joint Commission, Seventh Meeting, The Ecumenical Councils, Common Statement, 1993, available atLutheran–Orthodox Joint Commission (B. I. 5a. "We agree on the doctrine of God, the Holy Trinity, as formulated by the Ecumenical Councils of Nicaea and Constantinople and on the doctrine of the person of Christ as formulated by the first four Ecumenical Councils.").