American Federation of Labor Building

Marriott Marquis Washington, DC is a luxury hotel located on Massachusetts Avenue NW, in NW, Washington, D.C., United States. The hotel is connected to the Walter E. Washington Convention Center across 9th Street NW via an underground concourse. The Washington Marriott Marquis is considered a "convention center headquarters hotel", designed both to provide lodging for attendees at the Walter E. Washington Convention Center across the street, and to augment the convention center by providing smaller, more versatile meeting rooms. The hotel has 100,000 square feet (9,300 m2) of meeting room space, which includes a 30,000-square-foot (2,800 m2) main ballroom and two smaller 10,800-square-foot (1,000 m2) ballrooms. The building is topped by a 18,800-square-foot (1,750 m2) glass-encased penthouse, and a 5,200-square-foot (480 m2) outdoor event terrace. The hotel is owned by Capstone Development, the District of Columbia, ING Clarion Real Estate Investment, Marriott International, and Quadrangle Development Corporation. The operator is Marriott International. It opened on May 1, 2014, and has 1,175 rooms (which includes 49 suites), a lobby with multi-story atrium, and four dining outlets on the first floor. The hotel has 14 stories above ground, and four stories below.

The Henley Park Hotel is a 96-room boutique style hotel located on 10th street and Massachusetts Avenue NW in Washington, DC. It features an upscale restaurant, The Tavern, and is noted for its unique architecture. The Henley Park Hotel is a member of Historic Hotels of America, the official program of the National Trust for Historic Preservation.

The Lingua is a sculpture by American artist Jim Sanborn located at the Walter E. Washington Convention Center.

Mount Vernon Square is a city square and neighborhood in the Northwest quadrant of Washington, D.C. The square is located where the following streets would otherwise intersect: Massachusetts Avenue NW, New York Avenue NW, K Street NW, and 8th Street NW.

901 New York Avenue NW is a mid-rise Postmodern high-rise located in Downtown Washington, D.C., in the United States. The structure was developed by Boston Properties in an effort to help to revitalize the Mount Vernon Square neighborhood, and was completed in 2005. It is located on a roughly triangular parcel bounded by New York Avenue NW, K Street NW, and 10th Street NW, and is north of the CityCenterDC mixed-use residential, office, and retail project. The triangular area was originally home to Victorian housing but in 1977, the city used eminent domain to purchase the area southwest of Mount Vernon Square itself, and over the next few years, the homes and businesses on these blocks were razed. In the 1980s, Golub Realty and Willco Construction purchased the site and proposed an 11-floor office block. They sold it to Peterson Co., who sold it to Monument Realty in May 1999. Monument Realty had envisaged building either an office and retail complex, or a 1,000-room hotel. They finally sold it to Boston Properties for $43.2 million in October 2000. Boston Properties closed the parking lot on the site in late August 2002, and began construction of the building the following month. The architectural height of the building is 140 feet (43 m), although the height of the main roof is just 130.86 feet (39.89 m) and the height of the top floor is 118.36 feet (36.08 m). It has 11 stories, and a four-story underground parking garage. Reports of the building's interior space vary widely, with 540,000 square feet (50,000 m2) the most recently reported by the mainstream media. The facade is of polished granite and precast concrete in two colors. An atrium three stories in height with 36-foot (11 m) long arched steel trusses forms the lobby. Two very small parks exist on the triangular parcel of land, which are owned by the National Park Service. Acadiana, a 185-seat upscale restaurant on the ground floor which served Louisiana-and Cajun-style seafood was cited by Esquire magazine as one of the best new restaurants in the entire United States in 2006. The restaurant closed in December 2018, and as of January 2019 no replacement tenants have been announced. Miami-based Yardbird Southern Table & Bar has taken Acadiana's former space in April 2021.

The Carnegie Library of Washington D.C., also known as Central Public Library, now known as the Apple Carnegie Library, is situated in Mount Vernon Square, Washington, D.C. Donated to the public by entrepreneur Andrew Carnegie, it was dedicated on January 7, 1903. It was designed by the New York firm of Ackerman & Ross in the style of Beaux-Arts architecture. It was the first Carnegie library in Washington, D.C. and D.C.'s first desegregated public building.It was listed on the National Register of Historic Places, as "Central Public Library", in 1969.It was used as the central public library for Washington, D.C. for almost 70 years before it became overcrowded. The central library was then moved to Martin Luther King Jr. Memorial Library. After being shut down for ten years, it was renovated as part of University of the District of Columbia.In 1999, it became the headquarters for the Historical Society of Washington, D.C. The City Museum of Washington opened in the library in May 2003, but closed less than two years later.In 2014, Events DC twice sought to move the International Spy Museum into the library, but failed to win historic preservation approval.In September 2016, Apple Inc. proposed renovating the library into D.C.'s second Apple Store location. In December 2016, Events DC announced an agreement with the company for conversion of the space into a new store designed by Foster and Partners. The building was renamed the Apple Carnegie Library, and the Apple Store within opened on May 11, 2019. Apple hosts free daily sessions focused on photography, filmmaking, music creation, coding, design and more. On October 9, 2019 the first episode of Oprah's Book Club, a television series produced by Apple, was filmed with a live audience in the Library. The episode premiered on November 1 of the same year.The building also now houses the DC History Center on the second floor, and the Carnegie Gallery (featuring historic photographs and documents about the origins and history of the building) in the basement.

The Cato Institute is an American libertarian think tank headquartered in Washington, D.C. It was founded in 1977 by Ed Crane, Murray Rothbard, and Charles Koch, chairman of the board and chief executive officer of Koch Industries. Cato was established to have a focus on public advocacy, media exposure and societal influence. According to the 2017 Global Go To Think Tank Index Report (Think Tanks and Civil Societies Program, University of Pennsylvania), Cato is number 15 in the "Top Think Tanks Worldwide" and number 10 in the "Top Think Tanks in the United States".The Cato Institute is libertarian in its political philosophy, and advocates a limited role for government in domestic and foreign affairs as well as a strong protection of civil liberties. This includes support for lowering or abolishing most taxes, opposition to the Federal Reserve system, the privatization of numerous government agencies and programs including Social Security, the Affordable Care Act and the United States Postal Service, demilitarization of the police, along with adhering to a non-interventionist foreign policy.

The Samuel Gompers Memorial is a bronze statue in Washington, D.C., listed on the National Register of Historic Places. It is located at the intersection of 10th Street, L Street, and Massachusetts Avenue, Northwest, Washington, D.C. The statue is in memory of Samuel Gompers, an English-born American cigar maker, labor union leader and a key figure in American labor history.

The Carpenters Building (also known as United Brotherhood of Carpenters and Joiners-Local 132) is an historic office building located at 1010 10th Street (also known as 1001 K Street, N.W.) Northwest, Washington, D.C., in the Mount Vernon Square neighborhood.

The Walter E. Washington Convention Center is a 2.3-million-square-foot (210,000 m2) convention center located in Washington, D.C., owned and operated by the city's convention arm, Events DC. Designed in a joint venture by the Atlanta-based architecture firm Thompson, Ventulett, Stainback & Associates, Washington, DC- based architects Devrouax & Purnell Architects Planners PC and Mariani and Associates, the convention center is located in a superblock bounded by Mount Vernon Square and 7th, 9th and N streets, N.W. It is served by the Mount Vernon Square station on the Yellow and Green lines of the Washington Metro. It was completed in 2003.

1000 Block of Seventh Street and 649–651 New York Avenue NW are a collection of two and three story buildings in Washington D.C. which were listed on the National Register of Historic Places in 1984. They are located across the street from the Walter E. Washington Convention Center and adjacent to Mount Vernon Square, also listed on the NRHP. The buildings were mostly built in the 1870s for a German immigrant population. They have remained mostly intact since they were built even though the neighborhood around them has changed dramatically.

1010 Mass is a high-rise building in Washington, D.C. The building rises 15 floors and 157 feet (48 m) in height. The building was designed by architectural firm Esocoff & Associates and was completed in 2007, making it one of the most recently constructed high-rises in the city. As of July 2008, the structure stands as the 24th-tallest building in the city, tied in rank with 1620 L Street, 1333 H Street, 1000 Connecticut Avenue, the Republic Building, 1111 19th Street, the Army and Navy Club Building and the Watergate Hotel and Office Building. 1010 Mass is an example of postmodern architecture, with a facade composed of brick and cast stone. The structure is composed almost entirely of residential units, with a total of 163 condominiums; the lowest floor is used for retail. The entire structure also rises above a 169-unit underground parking garage.