This first ecumenical council was the first effort to attain consensus in the church through an assembly representing all of Christendom.

Schaff, Philip The first ecumenical council includes creed and canons of the council.

Others reject this theory in part because there were no patriarchs of Constantinople and Jerusalem at the time of the first ecumenical council.

The First Council of Nicaea was the first ecumenical council of the Church.

The first ecumenical council, that of Nicaea in 325, ended its Creed with the words "and in the Holy Spirit".

It is called Nicene because, in its original form, it was adopted in the city of Nicaea by the first ecumenical council, which met there in the year 325.

He took part in the First Ecumenical Council of Nicaea (325), where he was instrumental in countering the theological arguments of Arius and his followers.

From the time of the first ecumenical council the Christian church forbids voluntary physical castration, and the alleged self-castration of the theologian Origen was used to discredit him.

October 11 - Second Vatican Council: Pope John XXIII convenes the first ecumenical council of the Roman Catholic Church in 92 years.

The first ecumenical council in part was a continuation of Trinitarian doctrinal issues addressed in pre-legalization of Christianity councils or synods (see Synods of Antioch between 264-269AD).

Arius is notable primarily because of his role in the Arian controversy, a great fourth-century theological conflict that rocked the Christian world and led to the calling of the first ecumenical council of the Church.

Silvester did not attend the first ecumenical council, the First Council of Nicaea (325), but sent two priests as his representatives; the Western bishops of Carthage and Milan were also in attendance.

On April 20, 2010, at the GAFCON meeting in Singapore, he called for a new Anglican Ecumenical Council, modeled by the first Ecumenical Councils of the Christian Church.

In 325, the first ecumenical council (First Council of Nicaea) determined that Jesus Christ was God, "consubstantial" with the Father, and rejected the Arian contention that Jesus was a created being.

It was one of three councils, together with the Synod of Arles and the Synod of Ancyra, that first approached the character of general councils and prepared the way for the first ecumenical council.

There a small staff is laying the groundwork for the first ecumenical council of the Orthodox church to meet in over a thousand years; this could be for Orthodoxy what the Second Vatican Council was for Roman Catholicism.

In the time of the first Ecumenical Councils, the Patriarch of Antioch held the ecclesiastical authority over the Diocese of the Orient, which was to be extended from the Mediterranean Sea to the Persian Gulf.

The first ecumenical council was convened to address again the divinity of Christ (see Paul of Samosata and the Synods of Antioch) but this time through the teachings of Arius, an Egyptian presbyter from Alexandria.

The following year, Constantine and Licinius proclaimed the toleration of Christianity with the Edict of Milan, and in 325 Constantine convened and presided over the First Council of Nicaea, the first ecumenical council.

Against the new calendar, the argument is made that inasmuch as the use of the Julian calendar was implicit in the decision of the First Ecumenical Council at Nicaea (325), no authority less than an Ecumenical Council may change this decision.

While the Council of Ephesus thus forbade setting up a different creed as a rival to that of the first ecumenical council, it was the creed of the second ecumenical council that was adopted liturgically in the East and later a Latin variant was adopted in the West.