The Hotel Jefferson is a historic hotel in downtown St. Louis, Missouri. It opened in 1904 to serve visitors to the Louisiana Purchase Exposition and was named in honor of Thomas Jefferson. The original east half of the building was designed by Barnett, Haynes & Barnett; the Classical Revival structure features terra cotta decorations. The hotel was opened to the public for the first time on April 2, 1904, for a charity ball sponsored by the St. Louis chapter of the Daughters of the Confederacy and the Confederate Memorial Society. The hotel opened to overnight guests on April 29, 1904, the day before the World's Fair. The Democratic National Convention was held at the hotel in 1904 and 1916.