Home to Parumala Church, the Church's largest pilgrimage centre, Niranam traces its roots to St. Thomas in 54 CE and was constituted in 1877.
Counts above reflect Orthodox-held institutions only; churches, chapels, and other properties currently under schismatic occupation are catalogued separately below and are not included in these totals.
The region's Christian history is traced to 54 CE, when St. Thomas the Apostle is believed to have established St. Mary's Orthodox Church (Niranam Valiyapally), one of the ancient cradles of Christianity in India. The formal Diocese of Niranam was established in 1877 at the Synod of Veliyanad under Patriarch Ignatius Peter IV, who consolidated twenty-two parishes into one diocese. Its first Metropolitan was St. Gregorios of Parumala, declared a saint by the Holy Synod in 1947, and the Parumala Seminary served as its first headquarters.
The diocese was later entrusted to prominent Metropolitans and Catholicoi, including Pulikkottil Joseph Mar Dionysius II, Geevarghese Mar Dionysius of Vattasseril, Geevarghese Mar Gregorios, Thoma Mar Dionysius, Dr. Geevarghese Mar Osthathios, and directly to Baselios Oughen and Baselios Mar Thoma Mathews I.
Parumala Church is the Church's largest pilgrimage centre. About one million pilgrims visit it each year seeking the intercession of St. Gregorios, nearly 500,000 during the annual feast from 26 October to 2 November, many walking from Kanyakumari to Kasaragod. The diocese has grown greatly, with headquarters at the Bethany Aramana, Thiruvalla, and is led by H.G. Dr. Yuhanon Mar Chrysostomos.
11 districts, listed alphabetically.