The Church of South India (CSI) is a united Protestant Church in India. It is the result of union of a number of Protestant denominations in South India that occurred after the independence of India. The Church of South India is the successor of a number of Protestant denominations in India, including the Church of England; Church of India, Burma and Ceylon (Anglican); the United Church of Christ (Congregationalist); the British Methodist Church; and the Church of Scotland after Indian Independence. It combined the South India United Church (union of the British Congregationalists and the British Presbyterians); the then 14 Anglican dioceses of South India and one in Sri Lanka; and the South Indian District of the Methodist church. The Church of South India is a member of the Anglican Communion, World Methodist Council and World Communion of Reformed Churches. It is one of four united Protestant churches in the Anglican Communion, World Methodist Council and World Communion of Reformed Churches, with the others being the Church of North India, the Church of Pakistan, and the Church of Bangladesh. Being a United Protestant denomination, the inspiration for the Church of South India came from ecumenism and the words of Jesus Christ as recorded in the Gospel of John (17.21); as such "That they all may be one" is the motto of the Church of South India. With a membership of nearly four million, it is the second-largest Christian church based on the number of members in India. History Origins Four different church traditions were brought together in the CSI; Anglican, Congregational, Presbyterian, and Methodist. All these churches had been established in India through the missionary work of churches in Europe, America, and Australia, which had started their work in India at different periods from the beginning of the 18th century. The Church of South India Scheme was the first practical attempt of its kind toward a union, on the basis of the following points enunciated in the Chicago-Lambeth Quadrilateral: The Holy Scripture of the Old and the New Testaments as containing all things necessary to salvation and as being the rule and ultimate standard of faith. The Apostles' Creed as the Baptismal Symbol and the Nicene Creed as sufficient statement of the Christian faith. The two sacraments, ordained by Christ Himself — Baptism and the Supper of the Lord — ministered with the unfailing use of Christ's words of Institution