Marth Mariam Cathedral Church, the headquarters of Chaldean Syrian Christian community in India was established in 1814. The church was constructed at the behest of 52 Syrian Christian families brought by Sakthan Thampuran for trade and commercial activities from the various parts of Thrissur in the 18th century. Trade centres in Thrissur came up mostly around the Church. The group of markets around the church was the centre of gold business from very early times. Later it became the headquarters of the Chaldean Bishop, St Mar Abimalek Timotheus 1908 to 1945.The interior of this Church is an excellent example for the Syriac Church cultural model, The glass lanterns hanging in rows within the church are imported ones. The two-tiered pulpit, that is as old as the church, is still conserved. The first deck is supported on a branch coming out of the mouth of a dragon.This is one of the churches where service and sacraments are conducted entirely in the East Syriac liturgy. The church’s library has a rich collection of Syriac books. The most significant among the collection is the book, “Kashkol” a book of prayers, written in 1570, also a manuscript copy “Nomocanon” of Abdisho is kept which was traced in 1291.