Siloam was Alabama's most influential and important Baptist congregation and one of the strongest denominational centers in the South during the mid-19th century. Its pastor and laymen helped organize The Alabama Baptist State Convention in 1823, found Judson College in 1838 and Howard College in 1841, and begin The Alabama Baptist state paper there in 1843. The Alabama Resolutions, which greatly influenced the founding of the Southern Baptist Convention, were passed at Siloam in 1844, and the Home Mission Board of the SBC was founded there in 1845, with its offices remaining until 1882. During the mid-19th century, the Alabama Baptist Convention met at Siloam every other year. The original portion of the church, a good example of temple form Greek Revival architecture, was built in 1848-49 and is the third building occupied by the congregation. It was placed on the National Register of Historic Places on 12-27-1982.