The Christian Dynasty of Villarvattom A.D 510 - 1439
By this period, the great Empire of the Chera Kingdom came to ruins and an immense number of small independent Kingdoms came into existence. Their extents were limited. Thus the areas where Christians were in prominence established themselves into Kingdoms. Christians were traditionally good statesmen and warriors. Though there might have been several such centers of strong hold of Christians in Kerala, one particular Villarvattom Kingdom is mentioned often. This Kingdom Villarvattom Pana extended from the coastal islands of Chennamangalam, Maliankara and others to the north of and south of Udayamperoor. The capital of this kingdom was at mahadevarpattanam in the island of Chennamangalam and later it was shifted to Udayamperoor when the Arab invaders attached the island. Raja of Villarvottam in A.D 510 built the Udayamperror Church, which stands even today. There are several inscriptions in this church that supports this including the mention of one Raja Thomas who ruled in AD 900.
Metropolitan A.D 650
The coming to this coast of bishops from Persia seems to have been interrupted in the seventh century by a revolt of the Persian Metropolitan against the Nestorian patriarch of Babylon, the Metropolitan of Seleucia. In "Asseman",is a long letter from the Patriarch Jesujabus Adjabenus who was Patriarch from 650 to 660. The Patriarch says:- "Not only India, which extends from the shores of the kingdom of Persia as far as Quilon, a space of more than twelve hundred parasangs, but also your own country of the Persians lies in darkness, deprived of the light of divine doctrine which shines forth through bishops of the truth." About this date one of the bishops in India obtained the rank of Metropolitan. From the passage in "Asseman", it appears that this dignity was conferred by Saliba- Zacha who was Patriarch of Babylon from 714 to 728. The names of the Indian bishops have not been preserved, except in the case of two bishops, Mar Sapir and Mar Prodh, who landed at Quilon. The Council of Nicea laid down a rule that all bishops should meet the Patriarch in an annual synod. This rule was from time to time relaxed and finally in a synod held under Theodosius, who was Patriarch from 852 to 858, the obligation upon the more distant Metropolitans was reduced to sending a letter and funds every sixth year. The words of the Synod are quaint:- "But other Metropolitans, that is to say, of the Chinas, of India, of Persia and of Samarcand, situated in very distant countries, hindered by mountain ranges infested with robbers and by seas fatal with shipwrecks and tempests, so that they cannot come to us so often as they otherwise might wish, shall take care to send, every sixth year, letters of consent and union and in the same letters to set forth any business of their countries which requires an opportune remedy: and they shall take trouble that from all cities, great and small, be sent to the Patriarch what is right according to the ability of each man and the the Canons of the Fathers for the expenses of the patriarch's house."