Robert Barnwell Rhett was an American politician who served as a deputy from South Carolina to the Provisional Confederate States Congress from 1861 to 1862, a member of the US House of Representatives from South Carolina from 1837 to 1849, and US Senator from South Carolina from 1850 to 1852. As a staunch supporter of slavery and an early advocate of secession, he was a "Fire-Eater", nicknamed the "father of secession".

The Provisional Congress of the Confederate States, also known as the Provisional Congress of the Confederate States of America, was a unicameral congress of deputies and delegates called together from the Southern States which became the governing body of the Provisional Government of the Confederate States from February 4, 1861, to February 17, 1862. It sat in Montgomery, Alabama, until May 21, 1861, when it adjourned to meet in Richmond, Virginia, on July 20, 1861. In both cities, it met in the existing state capitols which it shared with the respective secessionist state legislatures. It added new members as other states seceded from the Union and directed the election on November 6, 1861, at which a permanent government was elected.