Kandanad Diocese is one of the oldest dioceses of the Orthodox Syrian Church. It was constituted with Kandanad St. Mary's Church at its centre along with two scores and odd parishes around it in the erstwhile Travancore State. The historical Synod of 1599 was held at Udayamperoor, a place close to Kandanad. The ancient Churches of Piravom, Kadamattam, Vadakara, Kolenchery, Mamalaserry, Nechoor, Mulakulam, as well as Kandanad came under this Diocese. It extends from Vaikom in the west to Idukki in the east spreading over the parts of Ernakulam, Kottayam and Idukki districts. The boundaries of the dioceses of Kochi and Angamaly intercept thoses of Kandanad at certain points.