"Coonan Cross Sathyam" AD Makaram 3rd,Friday 1653
Those who kept away from the Synod of Diamper continued as a small separate church in Trichur and were called the Chaldean Church. In 1653, the Nestorian church in Persia sent a bishop to Kerala. Knowing this the Portuguese authorities captured the bishop before he could land in Cochin and was imprisoned there where he died in duress. As soon as this was known, the enraged Christians in Malankara gathered under the leadership of Thomas Archdeacon at Mattanchery Church in Kochi and the nearby market on 1653 (Makaram 3rd, Friday). They took an oath proclaiming that "We or our children and their children to all generations to come will have nothing to do with the Roman Catholic Church nor the Pope of Rome from now on." There were over 2000 Christians at the (Church compound. They took the oath touching the cross in the front yard of the Church. Since all the people could not touch the cross, they tied ropes from the church and every one of the 2000 held the rope or touched the cross to take the oath. Since the cross had a slight bent, this historic oath came to be known as the Koonan Kurisu Sathyam. Thus ended the five decades of supremacy of the Roman church in Malabar. This shaking away of the yoke of Roman Catholicism was accelerated by the fact that Portuguese supremacy in the Indian Ocean was broken by the Dutch. Dutch were Protestants and gave their full support to this change over. As a result Thomas Archdeacon was ordained as the Bishop of Malabar under the name of Mar Thoma I by Mar Gregoroius the Patriarch of Jerusalem. (The Patriarchate of Jerusalem was part of the Patriarchate of Antioch. Mar Gregorious was the last of the Non-Chalchedonian Patriarchs of Jerusalem. He came to Malankara for this ordination. He is still remembered in the first dyptsych of the Orthodox Liturgy along with Mar Ignatius, the Patriarch of Antioch, and Mar Baselius the Catholicos of the East.) Since the Antiochian Patriarchate was known to have believed the theology of Jacob Burdhana, the church came to be known as the Jacobite Church of Malabar. A minority faction still remained faithful to the Roman pontiff.
Syrian Church of Thozhiyur AD 1772
In 1772 Mar Gregorios consecrated Abraham Mar Koorilose as bishop. This was not appreciated by his fellow bishop, who hindered his ministry. Mar Koorilose eventually retired to Thozhiyur where he led a life of prayer. This church continued as an independent church since then. Three time during its life time the main Malankara Syrian Church found themselves without a bishop. The Thoziyur Independent Church provided bishops for it to maintain its apostolic succession. Later it also provided a bishop for Mar Thoma Church when it found itself without a bishop even though the doctrines of Mar Thoma Church and the Thozhiyur Church are different. In return when the Thozhiyur Church was without a bishop, Mar Thoma Church provided a bishop for it. Thus Thozhiyur church became an instrument of maintianing the apostolic succession without break within the sister Malankara churches. Until recently Thozhiyur was the only church under this Biashopric. With the increased membership additional churches are being built. Cochin currently has a new church.