Located on Capitol Hill, this home of the House of Representatives and Senate also once housed the United States Supreme Court. President George Washington laid the cornerstone in 1793 and seven years later Congress met there for the first time in the central portion of the building. The House extension was completed in 1857 and the Senate in 1859. Today, the Capitol is connected with the Senate Office Buildings and the House Office Buildings by underground passageways. At night, multi-colored lights play on a large fountain linking the Union Station with the Capitol, and the huge illuminated Dome is a beautiful spectacle which can be seen from many parts of the city.