The Rayburn House Office Building (RHOB) is a congressional office building for the U.S. House of Representatives in the Capitol Hill neighborhood of Washington, D.C., between South Capitol Street and First Street. Rayburn is named after former Speaker of the House Sam Rayburn. It was completed in 1965 and at 2.375 million square feet (220,644 m²) is the largest congressional office building and the newest House office building.