Cathedral of St. Matthew the Apostle (Washington, D.C.)

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 Elizabeth Arden Building is an historic building, located at 1147 Connecticut Avenue, Northwest, Washington, D.C., in downtown Washington, D.C.

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

The Elliott Coues House is a historic house at 1726 N Street NW, in the Dupont Circle neighborhood of Washington, D.C. Built about 1880, it was the home of 19th-century historian and ornithologist Elliott Coues (1842–99) from about 1887 until his death. Coues helped found the American Ornithologists' Union in 1883 and edited about 15 volumes of journals, memoirs, and diaries by famous Western explorers and fur traders. The house was declared a National Historic Landmark in 1975.

The General Federation of Women's Clubs Headquarters, also known as the Miles Mansion, is a social clubhouse headquarters in Washington, D.C. Built as a private residence in 1875, it has served as the headquarters of the General Federation of Women's Clubs (GFWC) since 1922. It was declared a National Historic Landmark in 1991 for its association with the federation, which serves as an umbrella organization for women's clubs, a social movement dating to the mid-19th century. Tours of the headquarters, available by appointment, provide information about the activities of the GFWC and several historic rooms, including the 1734 entryway, the Julia Ward Howe Drawing Room, the dining room, music room and the GFWC International President's office. The headquarters also features changing exhibits of art, photographs and artifacts from its collections.

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

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 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 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.

The Courtyard Washington, DC Dupont Circle is a 143-room hotel, located at 1733 N Street Northwest, between Dupont Circle and Scott Circle in Washington, D.C.

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.