Elizabeth Arden Building

The Philanthropy Roundtable is a nonprofit organization that advises conservative philanthropists.

Nuns of the Battlefield is a public artwork made in 1924 by Irish artist Jerome Connor, located at the intersection of Rhode Island Avenue NW, M Street, and Connecticut Avenue NW, in Washington, D.C., United States. A tribute to the more than 600 nuns who nursed soldiers of both armies during the American Civil War, it is one of two monuments in the District that mark women's roles in the conflict. It is a contributing monument to the Civil War Monuments in Washington, D.C., listed on the National Register of Historic Places. In 1993, it was surveyed for the Smithsonian Institution's Save Outdoor Sculpture! program.

The Cathedral of St. Matthew the Apostle in Washington, D.C., most commonly known as St. Matthew's Cathedral, is the seat of the Archbishop of the Roman Catholic Archdiocese of Washington. As St. Matthew's Cathedral and Rectory, it has been listed on the National Register of Historic Places since 1974.The cathedral is in downtown Washington at 1725 Rhode Island Avenue NW between Connecticut Avenue and 17th Street. The closest Metrorail station is Farragut North, on the Red Line. It is seven blocks north and two blocks west of the White House.

Qorvis is an international Washington, D.C.-based public relations, advertising, media relations and crisis communications firm. It was acquired by the Publicis Groupe in January 2014, and became Qorvis/MSLGroup.On December 31, 2022, Qorvis was sold by Publicis to a group led by long-time Qorvis executive Matt J. Lauer.Qorvis provides public relations (PR) representation on behalf of a range of public companies, financial services firms, sovereign nations, and wealthy individuals. During the late-2000s financial crisis, Qorvis represented Wells Fargo and AIG.

The Demonet Building is composed of a historic townhouse and adjoining office building on the southeast corner of Connecticut Avenue and M Street NW in Washington, D.C. Constructed in 1880, the townhouse is the last Victorian residence on Connecticut Avenue between Dupont Circle and Farragut Square that has not been significantly altered. It features an octagonal tower topped by a dome with cartouche windows. Following a multi-year legal battle to demolish the townhouse, which had been added to the District of Columbia Inventory of Historic Sites in 1979, the Demonet Building and adjoining lot were sold for what was then a record price for downtown real estate. The adjoining office building, designed by Skidmore, Owings & Merrill, was completed in 1984. The building's namesake, John Charles Demonet, established a confectionery business on Pennsylvania Avenue in 1848. During the next several decades, he and his family grew the business into a successful company that included catering services. It was a confectionery supplier for the White House. In the early 1900s, the business was moved to Connecticut Avenue, a fashionable residential area at the time. It became a commercial pioneer of what was nicknamed the Fifth Avenue of Washington, D.C. After the business was moved a few blocks north in 1927, the Demonet family continued to own the building. It was rented to various retailers. The family sold the building in 1979. Since the modern addition was constructed, several organizations have owned the property, the most recent being an affiliate of the Qatari royal family.

The Propane Education and Research Council is a nonprofit that provides leading propane safety and training programs and invests in research and development of new propane-powered technologies. PERC is operated and funded by the propane industry. PERC programs benefit a variety of markets including transportation, agriculture, commercial landscaping, residential, and commercial building. PERC was authorized by the U.S. Congress with the passage of the Propane Education and Research Act (PERA), signed into law on Oct. 11, 1996. PERC is governed by a 21-member board appointed by the National Propane Gas Association and the Gas Processors Association. Each association appoints nine Council members and they cooperate in the appointment of three public members. PERC's operations and activities are funded by an assessment levied on each gallon of propane gas at the point it is odorized or imported into the United States.

The American Council of Trustees and Alumni (ACTA) is a conservative non-profit organization whose stated mission is to "support liberal arts education, uphold high academic standards, safeguard the free exchange of ideas on campus, and ensure that the next generation receives a philosophically rich, high-quality college education at an affordable price." ACTA does so primarily by calling on trustees to take on a more assertive governing role. It is based in Washington, D.C. and its current president is Michael Poliakoff.

The Mayflower Hotel is a historic hotel in downtown Washington, D.C., located on Connecticut Avenue NW. It is two blocks north of Farragut Square (one block north of the Farragut North Metro station). The hotel is managed by the Autograph Collection Hotels division of Marriott International. The Mayflower is the largest luxury hotel in the District of Columbia, the longest continuously operating hotel in the Washington D.C. area, and a rival of the nearby Willard InterContinental and Hay-Adams Hotels. The Mayflower is known as the "Grande Dame of Washington", the "Hotel of Presidents", and as the city's "Second Best Address" (the White House is the first)—the latter sobriquet attributed to President Harry S. Truman (a frequent guest at the hotel). Today it is a four-star hotel.

The São Toméan] ambassador in Washington, D.C. is the official representative of the Government in São Tomé to the Government of the United States.

The name "M Street" refers to two major roads in the United States capital of Washington, D.C. Because of the Cartesian coordinate system used to name streets in Washington, the name "M Street" can be used to refer to any east-west street located twelve blocks north or south of the dome of the United States Capitol (not thirteen blocks, as there is no J Street). Thus, in all four quadrants of the city there are streets called "M Street", which are disambiguated by quadrant designations, namely, M Street NW, NE, SW, and SE.

H2 USA is a hybrid organization governed by a partnership affiliated with the United States private sector economy and the public sector services. The alliance is supportive of a hydrogen economy and hydrogen technologies with a representation by more than thirty cooperatives considering associations, automakers, energy companies, fuel cell suppliers, materials and component manufacturers, national laboratories, non-governmental organizations, and the United States Department of Energy.

The National Museum of Catholic Art and History is a museum in Washington, D.C., focusing on Catholic art. It was formerly located in East Harlem, Manhattan, New York City. It was founded by Christina Cox in 1995.