The Toraja Mamasa Church was established on 7 June 1947, and based in West Sulawesi. It is a Protestant church, and a member of the World Communion of Reformed Churches.[1] It was a fruit of the Christian Reformed Churches in the Netherlands, a conservative Reformed denomination. Evangelism was started in 1931. These churches were grouped together in 1948 to form an independent denomination. This is the largest church in the Mamasa Valley.[2][3]