The Shortest Creed of Any Ancient Apostolic Church

The Church of the East receives exactly two councils as ecumenical, Nicaea in 325 and Constantinople in 381, and stopped there: it did not receive the Council of Ephesus in 431, and nothing convened since has been added to what those two councils settled. The Church of the East: An Illustrated History of Assyrian Christianity records this as making the Church of the East's dogmatic deposit the shortest of any ancient apostolic church still standing, set beside the three councils the Oriental Orthodox churches receive, the seven the Eastern Orthodox churches receive, and considerably more that the Catholic Church counts across its own conciliar history. The Christian Tradition: A History of the Development of Doctrine situates the comparison as more than a curiosity, since the number of councils a church receives is itself a kind of map of where and when it parted from the wider conciliar process that continued to develop doctrine after each split. A church that stopped at two councils is a church whose formal doctrinal history effectively closed with the fourth century, everything since then a matter of the church's own internal discipline and canon law rather than fresh conciliar definition binding on faith.