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The Mount Vernon Triangle Historic District is a historic district in the Mount Vernon Triangle neighborhood of Washington, D.C., consisting of 22 contributing residential, commercial, and industrial buildings, and one known archaeological site. The area was once a working class neighborhood for mostly German immigrants and home to semi-industrial enterprises such as a dairy and an automobile repair shop. The Northern Liberty Market that once stood on the corner of 5th Street and K Street NW played a large role in spurring development in the surrounding area as did the streetcars on Massachusetts Avenue and New York Avenue. The historic district was added to the District of Columbia Inventory of Historic Sites in 2005 and the National Register of Historic Places in 2006. The 22 buildings in the district were constructed between 1869 and 1946. Two of the buildings included in the historic designation process, 470 and 472 K Street NW, collapsed in 2014. Many of the buildings in the district have undergone a restoration process. Prather's Alley, which was once lined with dwellings, stables, and industrial businesses, is being redeveloped into a place for community residents to gather.

The Northern Liberty Market, later called Convention Hall Market and Center Market, was located on the east side of 5th Street NW, between K and L, in the present-day Mount Vernon Triangle neighborhood of Washington, D.C. It operated from 1875 to 1963.

Mount Vernon Triangle is a neighborhood and community improvement district in the northwest quadrant of Washington, D.C. Originally a working-class neighborhood established in the 19th century, present-day Mount Vernon Triangle experienced a decline in the mid-20th century as it transitioned from residential to commercial and industrial use. The neighborhood has undergone significant and rapid redevelopment in the 21st century. It now consists mostly of high-rise condominium, apartment and office buildings. Several historic buildings in the neighborhood have been preserved and are listed on the National Register of Historic Places. Mount Vernon Triangle is now considered a good example of urban planning and a walkable neighborhood.

Bar Chinois is an Asian restaurant and wine bar in Mount Vernon Triangle, Washington, D.C. The menu includes dim sum. The Infatuation has described the cuisine as Chinese fusion.

Seaton Park is a neighborhood-named pocket park located on National Park Service property at south of Massachusetts Avenue and north of I Street NW between 5th and 6th St NW in the Chinatown neighborhood of Washington, D.C. It is also referred to as Chinatown Park.

Milian Park is a neighborhood-named park located on National Park Service property at north of Massachusetts Avenue at I Street, NW in the Mount Vernon Triangle neighborhood of Washington, D.C. It is named after an inventor and scholar from Spain, Michael Austin Milian who died nearby in 1886.

455 Massachusetts Avenue is a high-rise office building located in the Mount Vernon Triangle neighborhood of Washington, D.C., United States. The 12-floor building was designed by Gensler and completed in 2007, and rises to 151 feet (46 m).

Rigo Walled Park is a neighborhood-named urban open space located on National Park Service property south of New York Avenue at L Street, NW in the Mount Vernon Square neighborhood of Washington, D.C. It is administered as part of the National Mall and Memorial Parks.

New York Avenue is a diagonal avenue radiating northeast from the White House in Washington, D.C. to the border with Maryland. It is a major east–west route in the city's Northwest and Northeast quadrants and connects downtown with points east and north of the city via Cheverly, Maryland, the John Hanson Highway, the Baltimore–Washington Parkway, and eventually, Interstate 95.

The Sixth & I Historic Synagogue is a non-denominational, non-membership, non-traditional Jewish synagogue located at the corner of Sixth Street and I Street, NW in the Chinatown neighborhood of Washington, D.C. It is one of the oldest synagogues in the city. In addition to hosting religious services for different Jewish denominations, the synagogue hosts many lectures, concerts, and art exhibitions for the general public.

The Old Engine Company No. 6 at 438 Massachusetts Ave in Washington, DC is a former District of Columbia Fire Department building which housed Engine 6 between February 17, 1879, and June 27, 1974. The two-story brick building was built during the volunteer period and is the only remaining example from that time.In 2012, the location was reopened as a restaurant.

The District of Columbia's at-large congressional district is a congressional district based entirely of the District of Columbia. According to the U.S. Constitution, only states may be represented in the Congress of the United States. The District of Columbia is not a U.S. state and therefore has no voting representation. Instead, constituents in the district elect a non-voting delegate to the U.S. House of Representatives. Despite lacking full voting privileges on the floor of the House of Representatives, delegates are voting members in U.S. Congressional committees and they lobby their congressional colleagues regarding the District's interests. While the office was initially created during the Reconstruction Era by the Radical Republicans, Norton P. Chipman (R) briefly held the seat for less than two terms before the office was eliminated completely. The District of Columbia Delegate Act Pub.L. 91–405, 84 Stat. 845-2 of 1970 authorized voters in the District of Columbia to elect one non-voting delegate to represent them in the United States House of Representatives. The act was approved by Congress on September 22, 1970 and subsequently signed into law by President Richard Nixon. Democrat Walter E. Fauntroy was elected as the district's delegate to Congress in a special election on March 23, 1971, receiving 58 percent of the 116,635 votes cast.Since 1993, when the House of Representatives has been under Democratic control, delegates, including the District of Columbia's delegate, have been allowed to cast non-binding floor votes when the House of Representatives was operating in the Committee of the Whole.The district is currently represented by Democrat Eleanor Holmes Norton.