House), the building "is plagued by safety, health, environmental and operational issues that are rapidly worsening. Many of the building’s systems are original from the 1908 construction." Architecture Architecturally, the elevations are divided into a rusticated base and a colonnade with an entablature and balustrade. The colonnades with thirty-four Doric columns that face the Capitol are echoed by pilasters on the sides of the building, and very inspired by the Louvre Colonnade in Paris. The Cannon Building is faced with marble and limestone; while the Senate's Russell Building's base and terrace are gray granite. Modern for its time, the building initially included such facilities as forced-air ventilation systems, steam heat, individual lavatories with hot and cold running water and ice water, telephones, and electricity. Both the Cannon Building and the Russell Building are connected to the Capitol by underground passages. Of special architectural interest is the rotunda. Eighteen Corinthian columns support an entablature and a coffered dome, whose glazed oculus floods the rotunda with natural light. Twin marble staircases lead from the rotunda to an imposing Caucus Room, which features Corinthian pilasters, a full entablature, and a richly detailed ceiling. Cannon Tunnel The Cannon Tunnel connects the Cannon House Office Building to the Capitol. The tunnel is lined with artwork from the annual Congressional Art Competition for high school students. Branching off the entrance to Cannon Tunnel is a separate tunnel to the Longworth House Office Building, and entrances to a cafeteria, shoe shiner/cobbler, and a Legislative Resource Center. Unlike the tunnels from the Capitol to the Senate Office Buildings and the Rayburn tunnel, the Cannon Tunnel has no subway line, and is primarily a pedestrian pathway. In addition, a separate tunnel runs between the building and the neighboring James Madison Memorial Building, a part of the Library of Congress. Gallery Notes References External links Cannon Renewal Project FAQs, Architect of the Capitol Ghosts of DC blog: Three Bits of Trivia About the Cannon House Office Building Carrère and Hastings buildings Congressional office buildings Beaux-Arts architecture in Washington, D.C. Government buildings completed in 1908 1908 establishments in Washington, D.C.