United States Department of Housing and Urban Development

Constitution Center (formerly known as the David Nassif Building) is an office building located at 400 7th Street SW in Washington, D.C. It is 140 feet (43 m) high and has 10 floors. Covering an entire city block, it is the largest privately owned office building in the District of Columbia. Current tenants include the Federal Housing Finance Agency and the Office of the Comptroller of the Currency. As of February 2014, Constitution Center was worth $725.8 million, making it the most valuable taxable property in the city.

L'Enfant Plaza is an intermodal transit station complex located at L'Enfant Plaza in the Southwest Federal Center neighborhood of Washington, D.C. It consists of an underground Washington Metro rapid transit station and an elevated Virginia Railway Express commuter rail station. The Metro station, which opened on July 1, 1977, is one of four major interchange stations on the Metro system. It serves five of the six Metro lines: the Green Line and Yellow Line with two side platforms on the upper level; and the Blue Line, Orange Line, and Silver Line with one island platform on the lower level. The VRE station, which has a single side platform serving the northernmost of the three tracks of the RF&P Subdivision, is served by the Manassas Line and Fredericksburg Line.

The Hilton Washington DC National Mall The Wharf, previously known as the L'Enfant Plaza Hotel, is a 367-room hotel located on the top four floors of a 12-story mixed-use building in downtown Washington, D.C., in the United States. It was designed by architect Vlastimil Koubek, and was opened on May 31, 1973, as the Loews L'Enfant Plaza Hotel, named after Pierre Charles L'Enfant, the first surveyor and designer of the street layout of the city. The hotel sits atop L'Enfant Plaza, an esplanade and plaza structure erected above a highway and a parking garage in the Southwest quadrant of the District of Columbia. The plaza and hotel were approved in 1955, but construction did not begin on the plaza (on which the hotel sits) until 1965. The plaza and esplanade were completed in 1968. The start of construction on the hotel was delayed three years, and was completed in May 1973. The construction led to a lawsuit after it was found that the foundation of an adjoining structure had encroached on the hotel's property. The hotel suffered a serious fire in 1975 that claimed the lives of two people. L'Enfant Plaza Corp., which owned the hotel, sold the structure to Sarakreek Holdings in 1998, which in turn sold it to the JBG Companies in 2003. A legal battle ensued over the hotel's ownership. The hotel's original operator, Loews Hotels, was replaced after thirty-two years by Crestline Hotels & Resorts in 2005, which was in turn replaced by the Davidson Hotel Company in 2010. The hotel closed on December 3, 2013, for what was originally intended to be a year-long overhaul and upgrade of the entire property. It reopened on April 1, 2019, as the Hilton Washington DC National Mall.

St. Dominic Church is a parish of the Roman Catholic Church, established in 1852. It is located in Southwest Washington, D.C., in the Archdiocese of Washington, and is administered by the Order of Preachers, more commonly known as the Dominicans, in the Province of St. Joseph (Eastern).

L'Enfant Plaza is a complex of four commercial buildings grouped around a large plaza in the Southwest section of Washington, D.C., United States. Immediately below the plaza and the buildings is La Promenade shopping mall.The plaza is located south of Independence Avenue SW between 12th and 9th Streets SW (9th Street actually runs underneath the centers of the buildings on the easternmost side of the plaza). It was built perpendicular to L'Enfant Promenade, a north-south running street and pedestrian esplanade part of which is directly above 10th Street SW. The plaza is named for Pierre (Peter) Charles L'Enfant, the architect and planner who first designed a street layout for the capital city (see L'Enfant Plan). It was dedicated in 1968 after completion of the north and south buildings.

The International Spy Museum is an independent non-profit museum which documents the tradecraft, history, and contemporary role of espionage. It holds the largest collection of international espionage artifacts on public display. The museum opened in 2002 in the Penn Quarter neighborhood of Washington, D.C., and relocated to L'Enfant Plaza in 2019.

The Federal Aviation Administration (FAA) is a U.S. federal government agency within the U.S. Department of Transportation which regulates civil aviation in the United States and surrounding international waters.: 12, 16  Its powers include air traffic control, certification of personnel and aircraft, setting standards for airports, and protection of U.S. assets during the launch or re-entry of commercial space vehicles. Powers over neighboring international waters were delegated to the FAA by authority of the International Civil Aviation Organization. The FAA was created in August 1958 (1958-08) as the Federal Aviation Agency, replacing the Civil Aeronautics Administration (CAA). In 1967 the FAA became part of the newly formed U.S. Department of Transportation and was renamed the Federal Aviation Administration.

The Inner Loop was two planned freeways around downtown Washington, D.C. The innermost loop would have formed an oval centered on the White House, with a central freeway connecting the southern segment to the northern segment and then continuing on to Interstate 95. Interstate 95 would have met Interstate 66, Interstate 295, Interstate 695, and US 50 while traversing the Inner Loop. A second loop was an arc across the northern section of the city, beginning at East Capitol Street at the Anacostia River and using the Missouri Avenue NW and Nebraska Avenue NW commercial corridors to terminate in Georgetown.

Tiber Island also known as The Island was a man-made island in Washington, D.C. formed when the Washington City Canal was dug to connect the stream beds of Tiber Creek and James Creek, creating an island out of an existing peninsula southwest of the Capitol. The canals have since been filled in, rejoining the island to the mainland. The Southwest Waterfront, Buzzard Point, National Mall, and L'Enfant Plaza areas were once on the island; at that time, their isolation from "the mainland" led to the area's colloquial nickname as "The Island."The Tiber Island Cooperative Homes derive their name from the historic island.

Delta Solar is a public artwork by Venezuelan sculptor Alejandro Otero located outside of the National Air and Space Museum in Washington, DC, United States. Delta Solar is meant to pay homage to modern technology and the Inca sun cult.

Banneker Circle is a partial traffic circle in Southwest Washington, D.C. The name of the circle commemorates Benjamin Banneker, an African American astronomer and almanac author. In 1791, Banneker assisted in the initial survey of the boundaries of the District of Columbia. The circle is near the south end of L'Enfant Promenade and the intersection of Interstate 395 and Maine Avenue. Benjamin Banneker Park is located in the center of the circle.

The Hirshhorn Museum and Sculpture Garden is an art museum beside the National Mall in Washington, D.C., United States. The museum was initially endowed during the 1960s with the permanent art collection of Joseph H. Hirshhorn. It was designed by architect Gordon Bunshaft and is part of the Smithsonian Institution. It was conceived as the United States' museum of contemporary and modern art and currently focuses its collection-building and exhibition-planning mainly on the post–World War II period, with particular emphasis on art made during the last 50 years.The Hirshhorn is situated halfway between the Washington Monument and the US Capitol, anchoring the southernmost end of the so-called L'Enfant axis (perpendicular to the Mall's green carpet). The National Archives/National Gallery of Art Sculpture Garden across the Mall, and the National Portrait Gallery/Smithsonian American Art building several blocks to the north, also mark this pivotal axis, a key element of both the 1791 city plan by Pierre L'Enfant and the 1901 MacMillan Plan.The building itself is an attraction, an open cylinder elevated on four massive "legs," with a large fountain occupying the central courtyard.