The Eastern Orthodox Church, officially the Orthodox Catholic Church, and also called the Greek Orthodox Church or simply the Orthodox Church, is the second-largest Christian church, with approximately 230 million baptised members. It operates as a communion of autocephalous churches, each governed by its bishops via local synods. The church has no central doctrinal or governmental authority analogous to the head of the Catholic Church. Nevertheless, the Ecumenical Patriarch of Constantinople is recognised by them as primus inter pares, a title formerly given to the patriarch of Rome. As one of the oldest surviving religious institutions in the world, the Eastern Orthodox Church has played an especially prominent role in the history and culture of Eastern and Southeastern Europe.
The ecumenical patriarch of Constantinople is the archbishop of Constantinople and primus inter pares among the heads of the several autocephalous churches that comprise the Eastern Orthodox Church. The ecumenical patriarch is regarded as the representative and spiritual leader of the Eastern Orthodox Christians worldwide. The term ecumenical in the title is a historical reference to the Ecumene, a Greek designation for the civilised world, i.e. the Roman Empire, and it stems from Canon 28 of the Council of Chalcedon.
Bartholomew is the 270th Archbishop of Constantinople, since 2 November 1991. In accordance with his title, he is regarded as the primus inter pares in the Eastern Orthodox Church, and as a spiritual leader of the Eastern Orthodox Christians worldwide.
Gregory Palamas was a Byzantine Greek theologian and Eastern Orthodox cleric of the late Byzantine period. A monk of Mount Athos and later archbishop of Thessalonica, he is famous for his defense of hesychast spirituality, the uncreated character of the light of the Transfiguration, and the distinction between God's essence and energies. His teaching unfolded over the course of three major controversies, (1) with the Italo-Greek Barlaam between 1336 and 1341, (2) with the monk Gregory Akindynos between 1341 and 1347, and (3) with the philosopher Gregoras, from 1348 to 1355. His theological contributions are sometimes referred to as Palamism, and his followers as Palamites.
John Zizioulas was a Greek Orthodox bishop who served as the Metropolitan of Pergamon of the Ecumenical Patriarchate of Constantinople from 1986 until his death in 2023. He was one of the most influential Orthodox Christian theologians of the 20th and 21st centuries.
John Meyendorff was a leading theologian of the Orthodox Church of America as well as a writer and teacher. He served as the dean of St. Vladimir's Orthodox Theological Seminary in the United States until June 30, 1992.
John Anthony McGuckin is a British theologian, church historian, Orthodox Christian priest and poet.
The Reverend Father Protopresbyter George Dion Dragas is an Orthodox Christian priest, theologian, and writer. He is currently professor of patristics at Holy Cross Greek Orthodox School of Theology in Brookline, Massachusetts.
Christos Yannaras was a Greek philosopher, Eastern Orthodox theologian and author of more than 50 books which have been translated into many languages. He was a professor emeritus of philosophy at the Panteion University of Social and Political Sciences, Athens.
The Greek Orthodox Archdiocese of Australia is the Australian archdiocese of the Greek Orthodox Church, part of the wider communion of Eastern Orthodox Christianity. The archdiocese is a jurisdiction of the Ecumenical Patriarchate of Constantinople. As of 2024, there were over 130 parishes and eight monasteries in the six dioceses of the archdiocese in Australia.
Barsanuphius, also known as Barsanuphius of Palestine, Barsanuphius of Gaza or Barsanuphius the Great, was a Christian hermit and writer of the sixth century.
Palamism or the Palamite theology comprises the teachings of Gregory Palamas, whose writings defended the Eastern Orthodox practice of Hesychasm against the attack of Barlaam. Followers of Palamas are sometimes referred to as Palamites.
Nicodemus the Hagiorite or Nicodemus of the Holy Mountain was a Greek ascetic monk, mystic, theologian, and philosopher, venerated as a saint in the Eastern Orthodox Church. His life's work was a revival of traditional Christian practices and patristic literature.
The Catholic Church and the Eastern Orthodox Church have been in a state of official schism from one another since the East–West Schism of 1054. This schism was caused by historical and language differences, and the ensuing theological differences between the Western and Eastern churches.
Brian Edward Daley, S.J. is an American Catholic priest, Jesuit, and theologian. He is currently the Catherine F. Huisking Professor of Theology (Emeritus) at the University of Notre Dame and was the recipient of a Ratzinger Prize for Theology in 2012.
The history of Eastern Orthodox Christian theology begins with the life of Jesus and the forming of the Christian Church. Major events include the Chalcedonian schism of 451 with the Oriental Orthodox miaphysites, the Iconoclast controversy of the 8th and 9th centuries, the Photian schism (863-867), the Great Schism between East and West, and the Hesychast controversy. The period after the end of the Second World War in 1945 saw a re-engagement with the Greek, and more recently Syriac Fathers that included a rediscovery of the theological works of St. Gregory Palamas, which has resulted in a renewal of Orthodox theology in the 20th and 21st centuries.
This is a timeline of the presence of Eastern Orthodoxy in Greece from 1974 to 2008. The history of Greece traditionally encompasses the study of the Greek people, the areas they ruled historically, as well as the territory now composing the modern state of Greece.
The Pan-Orthodox Council, officially referred to as the Holy and Great Council of the Orthodox Church, was a synod of set representative bishops of the universally recognised autocephalous local churches of the Eastern Orthodox Church held in Kolymvari, Crete. The Council sat from 19 to 26 June 2016.
Meliton, was a prelate of the Eastern Orthodox Church who served as the Metropolitan of Chalcedon from 1966 until his death in 1989. Born in Istanbul and educated at the Halki Theological Seminary, he was appointed Secretary of the Holy Synod by Patriarch Benjamin I in 1937 and in 1948 Protosynkellos to Patriarchs Maximus V and Athenagoras I.
Catholic–Eastern Orthodox relations have warmed over the last century, as both churches embrace a dialogue of charity. The Second Vatican Council (1962–1965) ushered in a new era of relations for the Roman Church towards the Orthodox Church, fondly describing the Orthodox as “separated brethren” with valid sacraments and an apostolic priesthood. The Orthodox Church, on the other hand, encouraged local churches to prepare for future dialogue in the Third Pan-Orthodox Conference in Rhodes (1964), and has since engaged in several ecumenical efforts with the Vatican. Significantly, in 1965 Pope Paul VI and Ecumenical Patriarch Athenagoras I of Constantinople jointly lifted the mutual excommunications of 1054. More recently, in November 2019, the current Patriarch of Constantinople, Patriarch Bartholomew, has stated he believes Orthodox re-union with the Catholic Church is inevitable.
