The Pan American Union Building is the headquarters for the

Organization of American States The Organization of American States (OAS; es, Organización de los Estados Americanos, pt, Organização dos Estados Americanos, french: Organisation des États américains; ''OEA'') is an international organization that was founded on 30 April ...

. It is located at 17th Street N.W. between C Street N.W. and

Constitution Avenue Constitution Avenue is a major east–west street in the northwest and northeast quadrants of the city of Washington, D.C., in the United States. It was originally known as B Street, and its western section was greatly lengthened and widened betw ...

Northwest, Washington, D.C. Northwest (NW or N.W.) is the northwestern quadrant of Washington, D.C., the capital of the United States, and is located north of the National Mall and west of North Capitol Street. It is the largest of the four quadrants of the city (NW, NE, S ...

History

On the former site of the

John Peter Van Ness Johannes Petrus "John Peter" Van Ness (November 4, 1769 – March 7, 1846) was an American politician who served as a U.S. Representative from New York from 1801 to 1803 and Mayor of Washington, D.C. from 1830 to 1834. Early life Van Nes ...

Mansion. The cornerstone was laid on May 11, 1908, by

Theodore Roosevelt Theodore Roosevelt Jr. ( ; October 27, 1858 – January 6, 1919), often referred to as Teddy or by his initials, T. R., was an American politician, statesman, soldier, conservationist, naturalist, historian, and writer who served as the 26t ...

Elihu Root Elihu Root (; February 15, 1845February 7, 1937) was an American lawyer, Republican politician, and statesman who served as Secretary of State and Secretary of War in the early twentieth century. He also served as United States Senator from N ...

, and

Andrew Carnegie Andrew Carnegie (, ; November 25, 1835August 11, 1919) was a Scottish-American industrialist and philanthropist. Carnegie led the expansion of the American steel industry in the late 19th century and became one of the richest Americans i ...

, and the building was dedicated on April 26, 1910. In 1919, the initial meeting of the

International Labour Organization The International Labour Organization (ILO) is a United Nations agency whose mandate is to advance social and economic justice by setting international labour standards. Founded in October 1919 under the League of Nations, it is the first and o ...

was held in the building. Between 1921 and 1922, the building was used for committee and subcommittee hearings throughout the

Washington Naval Conference The Washington Naval Conference was a disarmament conference called by the United States and held in Washington, DC from November 12, 1921 to February 6, 1922. It was conducted outside the auspices of the League of Nations. It was attended by nine ...

while closely guarded by marines with fixed bayonets. The building was added to the

National Register of Historic Places The National Register of Historic Places (NRHP) is the United States federal government's official list of districts, sites, buildings, structures and objects deemed worthy of preservation for their historical significance or "great artistic v ...

in 1969, and was designated a

National Historic Landmark A National Historic Landmark (NHL) is a building, district, object, site, or structure that is officially recognized by the United States government for its outstanding historical significance. Only some 2,500 (~3%) of over 90,000 places listed ...

in 2021, for its architecture and its role in international diplomacy.

References

External links

* * http://www.philadelphiabuildings.org/pab/app/ho_display.cfm/823231 * http://www.trumanlibrary.org/photographs/displayimage.php?pointer=1865&people=&listid=2 * https://www.loc.gov/pictures/item/90711000/ Buildings and structures completed in 1910 Government buildings on the National Register of Historic Places in Washington, D.C. Organization of American States Paul Philippe Cret buildings National Historic Landmarks in Washington, D.C. {{WashingtonDC-NRHP-stub