The Reformed Church is a branch of Protestant Christianity that emerged during the Protestant Reformation in the 16th century. It emphasizes the sovereignty of God, the authority of Scripture, and the necessity of grace through faith. The movement is rooted in the teachings of theologians like John Calvin and Huldrych Zwingli, who sought to reform the practices and beliefs of the Roman Catholic Church. Reformed Churches are characterized by their distinct worship styles, governance structures, and theological beliefs. They often practice predestination, the idea that God has already chosen who will be saved, and uphold the importance of community and social justice. Various denominations, such as the United Church of Christ and the Christian Reformed Church, fall under the Reformed tradition.