Noyes Armillary Sphere

The Congressional Club (founded in 1908) is an historic clubhouse located at 2001 New Hampshire Avenue NW, Washington, D.C., in the U Street Corridor. The organization it hosts, which is the official club of congressional spouses, was created in May 1908 with the Sixtieth Congress passage of HR22029. The Congressional Club is the only club in the world to be incorporated by an act of Congress. Since 1912, the club has hosted a luncheon honoring the First Lady of the United States. It is the largest annual event sponsored by the Club.

The James Buchanan Memorial is a bronze and granite memorial in the southeast corner of Meridian Hill Park Northwest, Washington, D.C. It was designed by architect William Gorden Beecher, and sculpted by Maryland artist Hans Schuler. Commissioned in 1916, but not approved by the U.S. Congress until 1918, it was completed and unveiled June 26, 1930. The memorial features a statue of Buchanan bookended by male and female classical figures representing law and diplomacy, engraved with text from a member of Buchanan's cabinet, Jeremiah S. Black: The incorruptible statesman whose walk was upon the mountain ranges of the law. The memorial in the nation's capital complemented an earlier monument, constructed in 1907–08 and dedicated in 1911, on the site of Buchanan's birthplace in Mercersburg, Pennsylvania.

Dante Alighieri, is a public artwork by Italian artist Ettore Ximenes, located at Meridian Hill Park in Washington, D.C., United States. Dante Alighieri was originally surveyed as part of the Smithsonian Institution's Save Outdoor Sculpture! survey in 1994. The monument is a tribute to Italian poet Dante Alighieri.

Meridian Hill Park, also known as Malcolm X Park, is a structured urban park located in the Washington, D.C., neighborhood of Columbia Heights; it also abuts the nearby neighborhood of Adams Morgan. The park was designed and built between 1912 and 1940. This 12-acre (49,000 m2), formally landscaped site is officially part of the National Capital Parks Unit of the National Park System, and is administered by the superintendent of nearby Rock Creek Park. Meridian Hill Park is bordered by 15th, 16th, W, and Euclid streets NW, and sits on a prominent hill 1.5 miles (2.4 km) directly north of the White House. Since 1969, the name "Malcolm X Park" has been used by many in honor of minister and activist Malcolm X.

Henderson Castle (also known as Henderson's Castle, Boundary Castle, and Prospect Castle) was a large Romanesque Revival house once located at 2200 16th Street NW in Washington, D.C. Built in 1889 for former Senator John B. Henderson, who introduced legislation for the Thirteenth Amendment to the United States Constitution abolishing slavery, and his wife, Mary Foote Henderson, the castle was sited on a prominent location overlooking the city. At the time, the area was mostly undeveloped, a fact Mary saw to change through decades of real estate development. Architect Eugene C. Gardner designed the castle and later renovations were carried out by architects Thomas Franklin Schneider, George Oakley Totten Jr., and Laussat R. Rogers. Mary hired Totten to design many of the grand mansions and embassies on 15th and 16th Street NW which she sold to wealthy residents and foreign governments. The Hendersons entertained prominent citizens at their castle, including Andrew Carnegie, members of Congress, foreign delegates, and justices of the Supreme Court. Mary was an advocate for women's rights, vegetarianism, and the temperance movement. Mary made national news when she and other members of the Independent Order of Rechabites took over 1,000 bottles of alcohol from the castle's cellar and smashed them on 16th Street. As part of her plans to develop the Meridian Hill neighborhood, Mary convinced Congress to buy land across the street from the castle, which was developed into Meridian Hill Park. After Mary's death in 1931, the Hendersons' vast art collection and fine furniture were sold at auction at drastically reduced prices. The castle remained unsold and it was converted into the Castle H Swim and Tennis Club in 1937, which included a boarding house on the upper floors. Loud after-hours parties annoyed neighbors, including Eugene and Agnes E. Meyer, whose White-Meyer House was located behind the castle. The couple purchased the castle property in 1941. It continued to be used as a boarding house and social event space until 1948, when all of the remaining contents were sold at auction. In January 1949, the castle was demolished. The property remained vacant for almost 30 years until Katharine Graham, daughter of the Meyers and publisher of The Washington Post, sold it to a real estate developer. A gated townhouse community, Beekman Place, was built on the site in 1976. Part of the castle's original perimeter wall and entrance gate still stands on 16th Street.

The Northumberland Apartments is a historic apartment building in the U Street Corridor of Washington, D.C. The Classical Revival building was constructed in 1909-10 by local real estate developer Harry Wardman and Albert H. Beers. In 1980, the building was placed on the National Register of Historic Places.

Meridian Hill is a small urban neighborhood in Washington, D.C., located in Northwest D.C. Meridian Hill is often considered to be a part of the larger neighborhoods of Adams Morgan and Columbia Heights, which it sits between. The neighborhood is primarily residential, though it also hosts a notable amount of diplomatic missions and embassies. Meridian Hill was developed as part of the City Beautiful movement in the late 19th century, when socialite Mary Foote Henderson embarked on a major initiative to turn Meridian Hill into the city's most prestigious area. While the neighborhood lured many prominent figures to build mansions and embassies, Henderson did not achieve her goal of building a new Presidential Mansion on the central area of the hill, which was eventually developed into Meridian Hill Park.

The Embassy of Equatorial Guinea in Washington, D.C. is the diplomatic mission of the Republic of Equatorial Guinea to the United States. It is located at 2020 16th Street Northwest, Washington, D.C. in the U Street Corridor neighborhood.The ambassador is Miguel Ntutumu Evuna Andeme.

The White-Meyer House is a historic house, located at 1624 Crescent Place, Northwest, Washington, D.C. designed by American architect John Russell Pope and built by order of American ambassador Henry White. For several years, the house was rented to Eugene Meyer, who then bought it in 1934. It was bought by non-profit organization Meridian International Center in 1987.

Meridian Hall is an historic house in the Columbia Heights neighborhood of Washington, D.C. It has been listed on the District of Columbia Inventory of Historic Sites since 1990 and it was listed on the National Register of Historic Places in 1991 as the Mansion at 2401 15th Street, NW.

Meridian Mansions, also known as The Envoy, is an historic structure located in the Adams Morgan neighborhood in the Northwest Quadrant of Washington, D.C. A.H. Sonnemann was the architect for what was considered the city's finest apartment hotel when it opened in 1918. The building has been home to members of Congress and diplomats over the years. The lobby contains marble columns and elaborate ornamental molding. At one time the building featured roof pavilions and lamp standards, which were removed around 1963. It was renovated in 1981 and it was listed on the National Register of Historic Places in 1983. The building is most notable due to its connection to the establishment of Czechoslovakia as an independent nation. Tomáš Garrigue Masaryk, the founder and first President of Czechoslovakia, resided here between July and November 1918. The first Czechoslovakian national flag to be created was flown from the building on October 18, 1918.

Meridian House is located at 1630 Crescent Place NW in Washington, D.C., a mile and a half north from the White House. It was designed by American architect John Russell Pope and built in 1920 for Ambassador Irwin B. Laughlin, who filled it with his extensive collection of French paintings and Oriental porcelain. It stayed in the Laughlin family until 1960, when it was purchased by the non-profit Meridian International Center.