First seven Ecumenical Councils
In the history of Christianity, the first seven ecumenical councils, from the First Council of Nicaea (325) to the Second Council of Nicaea (787), represented an attempt to reach an orthodox consensus...
First seven Ecumenical Councils - Wikipedia
Second Council of Constantinople
The Second Council of Constantinople is the fifth of the first seven ecumenical councils recognized as such by both West and East. Eastern Orthodox, Catholics, and Old Catholics unanimously recognize ...
Ancient church councils (pre-ecumenical)
Church councils are formal meetings of bishops and representatives of several churches who are brought together to regulate points of doctrine or discipline. The meetings may be of a single ecclesiast...
Ancient church councils (pre-ecumenical) - Wikipedia
First Council of Constantinople
The First Council of Constantinople (Greek: Κωνσταντινούπολις Konstantinoúpolis) was a council of Christian bishops convened in Constantinople (present-day Istanbul in Turkey) in AD 381 by the Rom...
First Council of Constantinople - Wikipedia
Council of Ephesus
The Council of Ephesus was a council of Christian bishops convened in Ephesus (near present-day Selçuk in Turkey) in AD 431 by the Roman Emperor Theodosius II. This third ecumenical council, an effor...
Council of Ephesus - Wikipedia
Second Council of Nicaea
The Second Council of Nicaea is recognized as the seventh of the first seven ecumenical councils by both West and East. Orthodox, Catholics, and Old Catholics unanimously recognize it; Protestant opi...
Second Council of Nicaea - Wikipedia
Third Council of Constantinople
The Third Council of Constantinople, counted as the Sixth Ecumenical Council by the Orthodox Church, the Catholic Church and other Christian groups, met in 680/681 and condemned monoenergism and monot...
Councils of Sens
The Councils of Sens were a number of church councils hosted by the Archdiocese of Sens.The first, around 600 or 601, in conformity with the instructions of pope St. Gregory the Great advised against ...
Council of Chalcedon
The Council of Chalcedon (/kælˈsiːdən/ or /ˈkælsɨdɒn/) was a church council held from October 8 to November 1, AD 451, at Chalcedon (a city of Bithynia in Asia Minor), on the Asian side of the Bosporu...
Arius
Arius (Ancient Greek: Ἄρειος, AD 250 or 256–336) was an ascetic Christian presbyter of Libyan birth, possibly of Berber extraction, and priest in Alexandria, Egypt, of the church of the Baucalis....
Arius - Wikipedia
Primacy of the Roman Pontiff
The primacy of the Bishop of Rome is an ecclesiastical doctrine concerning the respect and authority that is due to the Bishop of Rome from other bishops and their sees. Together with the Filioque c...
Primacy of the Roman Pontiff - Wikipedia
Meletius of Lycopolis
Meletius (died after 325) was bishop of Lycopolis in Egypt. He is known mainly as the founder and namesake of the Meletians (c. 305), one of several schismatic sects in early church history which were...
Fifty Bibles of Constantine
The Fifty Bibles of Constantine were Bibles in Greek language commissioned in 331 by Constantine I and prepared by Eusebius of Caesarea. They were made for the use of the Bishop of Constantinople in t...
Fifty Bibles of Constantine - Wikipedia
Nicene Creed
The Nicene Creed (Greek: Σύμβολον τῆς Νίκαιας, Latin: Symbolum Nicaenum) is a profession of faith widely used in Christian liturgy.It is called Nicene /ˈnaɪsiːn/ because originally adopted in the cit...
Nicene Creed - Wikipedia
Conciliarism
Conciliarism was a reform movement in the 14th-, 15th- and 16th-century Catholic Church which held that supreme authority in the Church resided with an Ecumenical council, apart from, or even against,...
Development of the Christian biblical canon
The Christian biblical canons are the books Christians regard as divinely inspired and constituting a Christian Bible. Books included in the Christian biblical canons of both the Old and New Testament...
Development of the Christian biblical canon - Wikipedia
Arianism
Arianism is the nontrinitarian, heterodoxical teaching, first attributed to Arius (c. AD 250–336), a Christian presbyter in Alexandria, Egypt, concerning the relationship of God the Father to the Son ...
Arianism - Wikipedia
First Council of Nicaea
The First Council of Nicaea (/naɪˈsiːə/; Greek: Νίκαια [ˈni:kaɪja]) was a council of Christian bishops convened in Nicaea in Bithynia by the Roman Emperor Constantine I in AD 325. This first ecum...
First Council of Nicaea - Wikipedia
Fourth Council of Constantinople (Eastern Orthodox)
The Fourth Council of Constantinople, accepted by some Eastern Orthodox as the Eighth Ecumenical Council, was held in 879–880. It confirmed the reinstatement of Photius as Patriarch of Constantinople....
Chalcedonian Creed
The Chalcedonian Definition (also Confession or Creed of Chalcedon) was adopted in A.D. 451 at the Council of Chalcedon in Asia Minor. That council was the fourth of the first seven Ecumenical Council...
Three-Chapter Controversy
The Three-Chapter Controversy, a phase in the Chalcedonian controversy, was an attempt to reconcile the Non-Chalcedonian Christians of Syria (Syriac Orthodox Church) and Egypt (Coptic Orthodox Church)...
Three-Chapter Controversy - Wikipedia
Monothelitism
Monothelitism or monotheletism (from Greek μονοθελητισμός "doctrine of one will") is a particular teaching about how the divine and human relate in the person of Jesus, known as a Christological doctr...
Monothelitism - Wikipedia
First Council of Ephesus
The Council of Ephesus was a council of Christian bishops convened in Ephesus (near present-day Selçuk in Turkey) in AD 431 by the Roman Emperor Theodosius II. This third ecumenical council, an effor...
First Council of Ephesus - Wikipedia
East-West Schism
The East–West Schism is the break of communion between what are now the Eastern Orthodox and Roman Catholic Churches which began in the 11th century.There had long been ecclesiastical differences and ...
East-West Schism - Wikipedia
Constantine I and Christianity
While the Roman Emperor Constantine the Great (reigned 306–337) ruled, Christianity began to transition to the dominant religion of the Roman Empire. Historians remain uncertain about Constantine's re...
Constantine I and Christianity - Wikipedia