Church Angel makes it easy to add your church to our comprehensive directory! The Baptist denomination is the largest free church denomination in the world with over forty-three members around the world. However, nearly thirty-three million Baptists live in America. The origins of Baptist churches can be traced back to John Smyth and the Separatist Movement in that began in England. Something that makes the Baptist church's beliefs unique is that they believe in the baptism of adult believers instead of infant baptism. Baptist denominations follow a congregational church governance in which each individual congregation is governed autonomously.