Christianity came to India in 52 AD with St Thomas who came to Kerala and converted the people of Malabar Coast into Christians. In the 4the century, Syrian merchants established the Nestorian sect whose services are in Armenia.
Other Eastern orthodox sects include the Jacobites, Canaanites, and Syrians. Roman Catholicism came into India in the 16th century with a Jesuit missionary, St Francis Xavier. The British influence in India has resulted in various Protestants sects.
Although there are churches in all parts of India the best examples are to be found Goa, Kerala, Bombay, Madras and Calcutta. Most of the 16 million Christians of India live in South India.