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