Envision yourself transported back to the early 20th century. Imagine the flurry of activity surrounding the construction of this magnificent building. Today we stand before the Cannon House Office Building. It is a cornerstone of American democracy. It stands as the oldest House office building in the United States.
Before 1908 Representatives often worked from their desks in the House Chamber. Some borrowed space in committee rooms. Others rented private quarters. The Cannon House Office Building changed everything.
In March 1901 Congress authorized the construction of a fireproof building. It would be adjacent to the Capitol grounds. This act addressed the growing need for office and storage space.
The House Office Building Commission was formed in 1903. Joseph G. Cannon, William P. Hepburn, and James D. Richardson were appointed. They were tasked to oversee the project. Architect of the Capitol Elliott Woods managed the contracts and construction.
The commission selected Square 690 for the site. It was bounded by Independence Avenue, First Street SE, New Jersey Avenue, and C Street SE. Clearing the site involved a massive amount of soil. This soil was used as fill for the Union Station construction site. A narrow-gauge railroad was built across the Capitol’s East Plaza to move the soil.
The architectural firm Carrère and Hastings was hired in 1904. Thomas Hastings oversaw the House office building. John Carrère managed a similar building for the Senate. They aimed to create buildings that complemented the Capitol. The Cannon House Office Building’s restrained classical design does not compete with the Capitol.
The exterior of the Cannon Building is reminiscent of the Colonnade du Louvre in Paris. Its design features a rusticated base. It also has a colonnade with an entablature and balustrade. The Independence Avenue colonnade boasts thirty-four Doric columns. These columns are echoed by pilasters on the New Jersey Avenue facade.
Constructing the building was not without its challenges. The Washington Terminal Company had an easement to build a railway tunnel. Engineers drove concrete pilings 26 feet deep to support the building over the tunnel.
Inside, the Cannon Rotunda is an architectural highlight. Eighteen Corinthian columns support a detailed entablature and coffered dome. The oculus of the dome floods the space with natural light. Twin marble staircases lead to the Caucus Room. This room features Corinthian pilasters and a richly detailed ceiling.
The Cannon Building provided larger committee rooms. These rooms allowed larger audiences to observe hearings. The Caucus Room hosted House Un-American Activities Committee hearings in the 1950s. In 2022 it was named the Speaker Nancy Pelosi Caucus Room.
The building was designed as a hollow trapezoid. This design allowed light to reach the inner offices. Each floor had 397 offices and 14 committee rooms. The offices featured mahogany doors and crown molding. They were equipped with modern amenities for the time. These included forced-air ventilation, steam heat, and telephones.
The 60th Congress occupied the Cannon Building in January 1908. A lottery system was used to assign rooms based on seniority. By 1913 the House had outgrown the space. A fifth floor was added.
A major remodeling occurred in 1932. This resulted in new suites and committee rooms. The Cannon Renewal Project began in 2014. It addresses accessibility and structural issues. The project is conserving the building’s historic features.
In 1962 the building was named for Joseph Gurney Cannon. He was Speaker of the House when the building was constructed.
The Cannon House Office Building stands as a testament to American history. Its architecture and historical significance make it a landmark. It continues to serve the needs of the House of Representatives. The Cannon House Office Building embodies both history and progress. It represents a vital part of the American story.