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Synod of Diamper

The Synod of Diamper (Udayamperoor Synod) (Malayalam: ഉദയംപേരൂർ സൂനഹദോസ്, romanizedUdayampērūṟ Sūnahadōs), held at Udayamperoor (known as Diamper in non-vernacular sources) in June 1599, was a diocesan synod, or council, that created rules and regulations for the ancient Saint Thomas Christians (also known as Mar Thoma Nasranis) of the Malabar Coast, a part of modern-day Kerala state, India, formally subjugating them and downgrading their whole Metropolitanate of India as the Diocese of Angamale, a suffragan see to the Archdiocese of Goa administered by Latin Church Padroado missionaries.[1][2] This synod also introduced forced Liturgical Latinisation and the eschewal of local practices and beliefs, leading to a significant ecclesial protest by Saint Thomas Christians known as Coonan Cross Oath and a subsequent schism in the mid-17th century.[3]

Background[edit]

Early history of Saint Thomas Christians[edit]

The Saint Thomas Christians, who trace their origin were in communion with the Church of the East of Persia and the Patriarch of the Seleucia-Ctesiphon, and relied on their bishops.[4] Thus, while the bishops from the Middle East were the spiritual heads of the Church, the general administration of the Church of Kerala was governed by an indigenous priest known as Arkkadiyakkon or Archdeacon.[5] He was the community leader of Saint Thomas Christians. Even in times when there were multiple foreign bishops, there was only one archdeacon for entire Saint Thomas Community.[6]

Portuguese missionaries and Saint Thomas Christians[edit]

The Portuguese fleet led by Pedro Alvarez Cabral, arrived in Malabar in 1500 with a missionary team of 19 members. More than half of them were Franciscans.[7] Later, most of the groups that came from Portugal included missionaries. Initially, the Portuguese missionaries were on good terms with the Saint Thomas Christians, but between 1520 and 1530, relations between them began to fall apart. This is because the Portuguese began to impose their church traditions on the Malabar Christians.[8]


The Church of the East collapsed by 1552, through the schism of 1552, and a faction (the modern day Chaldean Catholic Church) under the leadership of Yohannan Sulaqa joined in communion with the Church of Rome. It is difficult to say exactly how this split affected the Church of Saint Thomas Christians in Malabar. Following the split, both factions - the Nestorian and Chaldean Catholic - began sending their bishops to Kerala. Abraham, later known as Abraham of Angamaly was one of the last bishops from the Church of the East. Mar Abraham first arrived in India before 1556 as a Nestorian bishop from the traditional Nestorian Patriarchate. The Portuguese managed to arrest him and sent him off to Lisbon, but on the way he escaped at Mozambique and left to Mesopotamia and presented himself to Abdiso, the Chaldean patriarch who had declared allegiance to the Pope of Rome. The patriarch re-consecrated the Abraham, sent him with letters to Pope Pius IV.[9] Abraham received his episcopal ordination again, third time,[9] in Rome in 1565 and returned in India in 1568. In spite of the express approbation by Pope, he was not welcomed by the Portuguese authorities in Goa and was arrested second time. However, Abraham escaped in 1570 and reached Malabar, there he directed his faithful in defiance of the Portuguese until his death in 1597.[10]

Preparations for the Synod[edit]

After the death of Abraham, Aleixo de Menezes the Archbishop of Goa began efforts to bring Archdiocese of Angamaly under Goa. Menezes nominated Francis Ros as Administrator of Angamaly.[11] But by this time the Archdeacon, George (of the Cross), according to the custom and by appointment of Abraham, took up the administration of the Archdiocese of Angamaly. Therefore, Menezes had to withdraw the administrator.[12] But Menesis decided that Saint Thomas Christians should be unconditionally placed under the spiritual authority of the Pope. For this, he sought the help of viceroy of Goa, the Portuguese Captain of Kochi and the King of Kochi.[12] Also, the Portuguese were very careful at the ports to prevent any Eastern Bishops from entering Kerala.


Archbishop Menezes visited Malabar in February 1599. Menezes threatened to depose Archdeacon George and appoint in his place Thomas Kurian, another nephew of George whose claims had been ignored in 1593. In order to prevent a division, George gave in to the demands of Menezes.[11] After carrying out a visitation in various parishes of Saint Thomas Christians, gaining the support of the local rulers and some of the local clergy, also by ordaining a large number of new priests, and forcing Archdeacon, to submit to him, Menezes called for a synod to be convened in June 1599.[13] Instead of Angamaly, the headquarters of the diocese, a small place called Diamper (Udayamperur) near Kochi, the Portuguese stronghold, was chosen as the venue for the Synod.

The Infancy of our Saviour (The History of our Lady) (language: Syriac)

Book of John Barialdan (language: Syriac)

The Procession of the Holy Spirit (language: Persian)

Margarita Fidei (The Jewel)

Fathers (language: Unknown)

Life of Abed Isho (language: Arabic)

Book of Synods (language: Syriac)

Book of 'Timothy the Patriarch' (language: Persian)

Domingo or Letter of the Lord's-day (language: Malayalam)

Maclamatas (language: Syriac)

Uguarda or Rose (language: Greek)

Camiz (language: Syriac)

Menra (language: Hebrew)

Book of Orders (language: Tamil)

Book of Homilies (language: Arabic)

An Exposition of the Gospels (language: Syriac)

Book of Hormisda Raban (language: Greek)

Book of Lots (language: Aramaic).

A book of unknown title which is a Nestorian version of Flos Sanctorum (language: Syriac)

Parisman or (language: Persian)

Persian Medicine

Reception of the synod[edit]

The Church authorities noted the result of the synod was not as helpful as they expected. As the Catholic Encyclopedia (1913) says, "The only case in which an ancient Eastern rite has been wilfully romanized is that of the Uniat Malabar Christians, where it was not Roman authority but the misguided zeal of Alexius de Menezes, Archbishop of Goa, and his Portuguese advisers at the Synod of Diamper (1599) which spoiled the old Malabar Rite."


After the Synod of Diamper, on 25 November 1599, a letter was sent to Pope by the Archdeacon, giving information about the synod and its work. The letter praises the work of Menezes and requests the appointment of Menezes or Francis Ros as their bishop.[28] The letter does not fully represent the genuine sentiments of Archdeacon, as by that time he was completely at the mercy of the Portuguese and the only thing left for him to do was to follow their directives.[17]


In this way, the Synod of Diamper achieved one of the aims of the Portuguese policy in Kerala, to separate the Syrian Christians of Malabar from the Chaldean Patriarch and to extend the influence of Portuguese Padroado in India. As a result, the King of Portugal got the right of nomination to the ancient See of Saint Thomas in Malabar. The Archbishopric of Angamale was degraded to a Portuguese Padroado diocese under Goa on August 4, 1600, AD.[17]

Paul Pallath, "The Synod of Diamper: valid or invalid?"

S.J., "The Synod of Diamper Revisited", Pontifical Instituto Orientale, Rome, 2001.

George Nedungatt

Joseph Kuzhinjalil, "The disciplinary Legislation of Synod of Diamper" (1975)

Jonas Thaliath, "The Synod of Diamper" (1958)

Connolly, "The Work of Meneses"

Codrington, "The Chaldean Liturgy"

Codrington, "The Malabar Liturgy and Synod of Diamper"

Neill, Stephen - (1977) A history of Christian missions Neill, Stephen - The story of the Christian church in India and Pakistan

Eric Frykenberg, Robert - Christianity in India

Hough, James - 1845 - The history of Christianity in India: Volume 4

Sir William Kaye, John - Christianity in India

Bruce Firth, Cyril - An introduction to Indian church history

Hunter, W.W. - (1886) The Indian Empire; Its People History and Products pp 240

Logan, William - (1887) Malabar Manual pp 119

Nangam Aiya, V. - (1906) The Travancore State Manual Volume 2 pp 243

Barton, John M. - (1872) The Syrian Christians: Narrative of a Tour in the Travancore Mission of the Church Missionary Society Mission Life, Vol. III * * Geddes, Michael - (1694) A short History of the Church of Malabar

Henry, J. & Parker, J - The Christians of St. Thomas and their liturgies

Milne Rae, George - Syrian Church in India Whitehouse, Thomas - (1873) Lingerings of light in a dark land: researches into the Syrian church of Malabar * * Brown, Leslie- The Indian Christians of St Thomas

David Macbride, John - (1856) - The Syrian church in India

Udayamperoor Synod Church

Pontifical Council For Promoting Christian Unity

History of Udayamperoor Synodal Church in Malayalam

History of the Syro-Malabar Church

Catholic Encyclopedia: St. Thomas Christians (Archbishop Menezes and the Synod of Diamper)

Catholic Encyclopedia: Rites

http://thomaschristians.blogspot.com/2011/06/synod-of-diamper.html