O Street Museum Foundation

The Mansion on O Street is an American luxury boutique hotel in the Dupont Circle historic district of Washington D.C. The hotel is noted for eccentric interior styling which includes hidden doors, secret passages, and rooms in which all furnishings and fixtures are for sale. The four-story building contains guest rooms, a private Social club, the O Street Museum Foundation and a conference center.

Sonny Bono Memorial Park is a park in Northwest Washington, D.C., at the intersection of New Hampshire Avenue, 20th Street, and O Street near Dupont Circle. It is named for Sonny Bono. The park was established in 1998, after Bono's death, by Bono family friend Geary Simon, a local real estate developer. He approached the D.C. Department of Parks and Recreation's Park Partners program and paid $25,000 of his own money to revitalize an unused 800-square-foot (74 m2) triangle of grass on a traffic island. His improvements included installing an underground sprinkler system, planting new Kentucky bluegrass and a Japanese maple, as well as benches and a wrought-iron fence. At the entrance, on the ground, is a plaque that reads as follows: IN MEMORY OF MY FRIEND SONNY BONO 1935-1998; ENTERTAINER - ENTREPRENEUR - STATESMAN - FRIEND. Beneath the plaque is a vault of Bono memorabilia, including the sheet music for "The Beat Goes On", his official Congressional cufflinks, and a mug from his string of Bono's Restaurants.

Heurich House Museum, also known as the Christian Heurich Mansion or Brewmaster's Castle, is a Gilded Age mansion in the Dupont Circle neighborhood of Washington D.C.

The Association of Advanced Rabbinical and Talmudic Schools (AARTS) is a faith-based national accreditation association for Rabbinical and Talmudic schools. It is based in New York, NY and is recognized by the Council for Higher Education Accreditation and United States Department of Education.In the field of Rabbinical and Talmudic education the association sees itself as both a gatekeeper and a historical authority. They aim to hold traditional thought in a modern world through balance of the old and new.

The American Council on Education (ACE) is a nonprofit 501(c)(3) U.S. higher education association established in 1918. ACE's members are the leaders of approximately 1,700 accredited, degree-granting colleges and universities and higher education-related associations, organizations, and corporations. The organization, located in Washington, D.C., conducts public policy advocacy, research, and other initiatives related to key higher education issues and offers leadership development programs to its members and others in the higher education community.

The Washington Gallery of Modern Art was a short-lived gallery promoting contemporary art near Dupont Circle in Washington, DC, United States, during the 1960s. The gallery remained open for seven years, opening in October 1961 and closing in September 1968. Its collection of 153 works was purchased by the Oklahoma City Museum of Art in 1968 for $110,000. The collection included 20th-century artists, Ellsworth Kelly, Robert Indiana, Grace Hartigan and Marcel Duchamp.

The James G. Blaine Mansion, commonly known as the Blaine Mansion, is a historic house located at 2000 Massachusetts Avenue NW, in the Dupont Circle neighborhood of Washington, D.C. The imposing house was completed in 1882 for James G. Blaine, a Republican politician from Maine who served as Speaker of the House, and later as a US Senator and US Secretary of State. He was also a presidential candidate who was narrowly defeated by Grover Cleveland in the 1884 United States presidential election. In addition to Blaine, the mansion has served as the residence of other prominent individuals, including wealthy businessmen Levi Leiter and George Westinghouse, and French ambassador Jules Patenôtre des Noyers. During World War I it was used as a meeting space for the newly formed United Service Club. Following the war, diplomatic occupants including the Japanese embassy and Colombian Ambassador Enrique Olaya Herrera leased the building. The mansion was used as office space for the Rural Electrification Administration during the Great Depression and by New York City Mayor Fiorello La Guardia during World War II when he led the Office of Civilian Defense. The United Nations leased part of the building as office space for the Food and Agriculture Organization in the late 1940s and Information Center in the 1950s. The lower floors of the mansion have remained in use as office space for various businesses since that time. In the late 2000s and early 2010s, the building was completely renovated after it was purchased by diplomat and attorney John R. Phillips and his wife, journalist and Obama administration official Linda Douglass. The renovation included converting the upper floors into a penthouse, renovating an adjoining commercial space fronting P Street, and constructing a narrow luxury residential building and underground parking deck on land adjoining the mansion. Designed by noted architect John Fraser, the mansion is a combination of the Châteauesque, Queen Anne, and Second Empire architectural styles. The mansion was one of several large residences that once stood on the perimeter of Dupont Circle, a traffic circle and small park at the intersection of 19th Street, P Street, Connecticut Avenue, Massachusetts Avenue, and New Hampshire Avenue. The other remaining large homes on the circle are the Patterson Mansion and Wadsworth House, more commonly known as the Sulgrave Club. The Blaine Mansion was added to the District of Columbia Inventory of Historic Sites in 1964. The building is a contributing property to the Massachusetts Avenue Historic District, which was listed on the National Register of Historic Places (NRHP) in 1974, and the Dupont Circle Historic District, listed on the NRHP in 1978.

The Lion Building is an office building and the seat of the diplomatic missions of the Socialist Republic of Vietnam and the former seat of the Republic of South Sudan to the United States. It is located at 1233 20th Street Northwest, Washington, D.C., in the Dupont Circle neighborhood.

The Vietnamese Ambassador to the United States is the official representative of the Vietnamese government to the government of the United States. The embassy is located at the Lion Building and the ambassador resides in Washington, D.C. at 2251 R Street, Northwest. From the 1950s to May 23, 1975, the residence of the ambassador hosted the embassy of South Vietnam, when it was closed. It later donated its film reel collection to the Library of Congress.

The Portuguese Embassy in Washington, D.C. is the diplomatic mission of Portugal to the United States. The building is located at 2012 Massachusetts Avenue in Northwest, Washington, D.C., in the Embassy Row neighborhood.

The Center for Individual Rights (CIR) is a non-profit public interest law firm in the United States. Based in Washington, D.C., the firm is "dedicated to the defense of individual liberties against the increasingly aggressive and unchecked authority of federal and state governments". The Center is officially nonpartisan. Its work focuses on enforcement of constitutional limits on state and federal power, primarily through litigation. CIR's primary focus for most of its existence has been challenges to what it regards as unconstitutional or unlawful preferences based on race, sex, or another protected status. It has represented members of many races but is best known for challenging affirmative action. Another major focus for CIR is free speech. It has represented individuals and groups, often in university environments, challenging attempts to interfere with speech deemed "politically incorrect". A third focus has been federalism, the attempt to prevent Congress from legislating beyond the powers provided to it in the Constitution.

The Institute for Credentialing Excellence (ICE) is one of the two main U.S. organizations that accredit personnel certifications or certificates. In November 2009 the ICE formally changed its name from the National Organization for Competency Assurance (NOCA).The ICE is an accredited standards developer by the American National Standards Institute.