<Li> The Sixth Ecumenical Council is the third of Constantinople in 681; it declared that Christ has two wills of his two natures, human and divine, contrary to the teachings of the Monothelites . </Li> <Li> The Seventh Ecumenical Council was called under the Empress Regent Irene of Athens in 787, known as the second of Nicaea . It supports the veneration of icons while forbidding their worship . It is often referred to as "The Triumph of Orthodoxy". </Li> <P> There are also two other councils which are considered Ecumenical by some Orthodox . All Orthodox agree that the decisions of these further councils are valid; the disagreement is only whether they carry sufficient importance to be considered truly Ecumenical: </P> <Dl> <Dd> 8 . The Fourth Council of Constantinople was called in 879 . It restored St. Photius to his See in Constantinople and condemned any alteration of the Nicene - Constantinopolitan Creed of 381 . </Dd> </Dl>

In what way is eastern orthodox similar to catholicism