The Silesian Evangelical Church of the Augsburg Confession (SECAC) is the biggest Lutheran Church in the Czech Republic besides the Evangelical Church of Czech Bretheren which is united Lutheran and Reformed. Its congregations are located mainly in the Czech part of Cieszyn Silesia. A significant number of the followers belong to the Polish ethnic minority. There is a strong heritage of pietism and evangelicalism in the church. In 2009, it reported 15,632 baptized members.