Nov. 26, 1860: A column is put in place on the connecting corridor of the House East Front Colonnade. Just to the right of the column are Sen. Jefferson Davis of Mississippi and Architect of the Capitol Thomas U. Walter. Davis would resign his Senate seat within two months of this photograph, becoming president of the Confederate States of America shortly thereafter. But as a Senator, he was instrumental in securing the first appropriation for the Capitol extensions, which were completed in 1868.