The Reformed faith is a branch of Protestant Christianity that emerged during the 16th-century Reformation. It emphasizes the sovereignty of God, the authority of Scripture, and the necessity of grace through faith. Key figures include John Calvin and Martin Luther, who challenged the practices of the Roman Catholic Church and sought to return to biblical teachings. Central to the Reformed faith is the belief in the Five Solas, which highlight core principles such as salvation by grace alone and faith alone. Reformed theology also stresses the importance of community worship and the sacraments, particularly baptism and the Lord's Supper, as means of grace.