[2] In the Latin Catholic Church, the post of archdeacon, originally an ordained deacon (rather than a priest), was once one of great importance as a senior official of a diocese.
The term "archdeacon" appears for the first time in Optatus of Mileve's history of Donatism of about 370, in which he applies it to someone who lived at the beginning of that century.
These functions included not only financial administration but also the discipline of the clergy, and examination of candidates for priesthood.
Large dioceses had several archdeaconries, in each of which the archdeacon (usually by now a priest), had an authority comparable to that of the bishop.
Only the archdeacon associated with the cathedral chapter continued to exist as an empty title, with duties almost entirely limited to liturgical functions.
Archdeacons serve the church in part of a diocese by taking particular responsibility for all buildings, the welfare of clergy and their families and the implementation of diocesan policy for the sake of the Gospel.
[1] In some parts of the Communion where women cannot be consecrated as bishops, the position is the most senior office a female cleric can hold: this being so, for instance, in the (Anglican) Diocese of Sydney.
As such, he usually travels with the ruling bishop to various parts of the diocese, and will sometimes act as his secretary and cell attendant, ensuring that he is able to balance his monastic life with his hierarchical duties.
While the Catholicos Patriarch of Seleucia-Ctesiphon reserved for himself the right to send his own prelates originating from Iraq to the Indian diocese, the continuous governance of his Indian flock was secured by the indigenous Archdeacon serving as the head of all the priests in Malabar and representing the bishop's will.
According to the traditional structure, the Indian Church of the East was governed by a metropolitan sent by the Catholicos Patriarch.
At the same time, at the local level, in India, church affairs were governed by the Malabar Assembly or Malankara Yogam.
This situation is best explained by the fact that from the point of view of the East Syriac Church structure the archdeacon had an ecclesiastical function, but from that of the St Thomas Christian community he had also a socio-political, princely function, representing the unity of the Christian nation, or caste(s), of Hindoo (India).