One Judiciary Square is a highrise office building at 401 Fourth Street NW in the Judiciary Square neighborhood of Washington, D.C.

Washington, D.C.

Washington, D.C., formally the District of Columbia and commonly referred to as Washington, "the District", or simply D.C., is the capital of the United States. On July 16, 1790, the United States Congress approved the creation of a permanent national capital as permitted by the U.S. Constitution....

 Designed by architect Vlastimil Koubek

Vlastimil Koubek

Vlastimil Koubek was a Czech American architect who designed more than 100 buildings, most of them in the Washington, D.C., metropolitan area. When he retired, he had designed buildings worth more than $2 billion. Most of his work is Modernist in style, although he developed a few structures in...

, the building is 129.67 feet (39.5 m) tall and has approximately 10 floors. Its construction ended in 1990.

Between 1992 and 1999, One Judiciary Square housed the offices of the mayor

Mayor of the District of Columbia

The Mayor of the District of Columbia is the head of the executive branch of the government of Washington, D.C. The Mayor has the duty to enforce city laws, and the power to either approve or veto bills passed by the Council of the District of Columbia...

 and Council of the District of Columbia

Council of the District of Columbia

The Council of the District of Columbia is the legislative branch of the local government of the District of Columbia. As permitted in the United States Constitution, the District is not part of any U.S. state and is instead overseen directly by the federal government...

 while repairs were made to the historic John A. Wilson Building

John A. Wilson Building

The John A. Wilson Building, popularly known simply as the Wilson Building or the JAWB, houses the offices and chambers of the Mayor and Council of the District of Columbia. Originally called the District Building, it was renamed in 1994 to commemorate former Council Chair John A. Wilson...

. One Judiciary Square now houses the offices of prominent municipal government agencies such as the D.C. Board of Elections and Ethics, the Office of the D.C. Attorney General, and the D.C. Office of Zoning. In August 2009, it was one of the first government buildings in Washington to be fitted with a green roof

Green roof

A green roof is a roof of a building that is partially or completely covered with vegetation and a growing medium, planted over a waterproofing membrane. It may also include additional layers such as a root barrier and drainage and irrigation systems...

. In addition, the city completed a $7.5 million renovation in September 2011 to improve the building's energy efficiency. The entrance to One Judiciary Square features statues of Pierre L'Enfant and Frederick Douglass

Frederick Douglass

Frederick Douglass was an American social reformer, orator, writer and statesman. After escaping from slavery, he became a leader of the abolitionist movement, gaining note for his dazzling oratory and incisive antislavery writing...

 that were commissioned for inclusion in the National Statuary Hall Collection

National Statuary Hall Collection

The National Statuary Hall Collection in the United States Capitol comprises statues donated by individual states to honor persons notable in their history...

 in the United States Capitol

United States Capitol

The United States Capitol is the meeting place of the United States Congress, the legislature of the federal government of the United States. Located in Washington, D.C., it sits atop Capitol Hill at the eastern end of the National Mall...

. However, the District of Columbia is not a state and therefore the statues have not been admitted to the collection.