George Washington Masonic National Memorial

Fort Ellsworth was a timber and earthwork fortification constructed west of Alexandria, Virginia, as part of the defenses of Washington, D.C. during the American Civil War. Built in the weeks following the Union defeat at Bull Run, Fort Ellsworth was situated on a hill north of Hunting Creek, and Cameron Run, (which feeds into it). From its position on one of the highest points west of Alexandria, the fort overlooked the Orange and Alexandria Railroad, the Little River Turnpike, and the southern approaches to the city of Alexandria, the largest settlement in Union-occupied Northern Virginia.

The Rosemont Historic District is a historic district in Alexandria, in the U.S. state of Virginia. It was added to the National Register of Historic Places in 1992. Ivy Hill Cemetery is located within the district.

Alexandria Union Station is a historic railroad station in Alexandria, Virginia, south of Washington, D.C. To avoid confusion with nearby Washington Union Station, the station is often referred to as simply Alexandria. Its Amtrak code is ALX.The station is located on Callahan Drive in the Old Town section of the city. It is served by both Amtrak intercity and Virginia Railway Express (VRE) commuter rail lines. The station serves as an alternative stop for Amtrak riders traveling through the Washington area, analogous to the role Newark Penn Station plays in the New York area. It is located directly across the tracks from the King Street–Old Town station of the Washington Metro. Since the opening of the Metro station in 1983, the city has touted the station as an intermodal hub for regional mass transit, linking Amtrak, VRE, and Metro with a number of Alexandria DASH and Metrobus lines. The Virginia Department of Transportation and Northern Virginia Transportation Authority have plans to build a pedestrian tunnel between Union Station and King Street-Old Town; presently, those transferring from Amtrak to Metro must walk about 600 feet (180 m) along King Street.The original passenger terminal, a one-story brick building completed in 1905, is still in use. Unlike most stations from the era, it was built in the Federal Revival style. The station was extensively renovated in 1982, with further improvements in the mid-1990s. The stone and concrete Veterans of Foreign Wars memorial was constructed at the station in 1940.

The Albert V. Bryan United States Courthouse is a United States courthouse of the United States District Court for the Eastern District of Virginia. It is located at 401 Courthouse Square (2200 Jamieson Avenue) in Alexandria, Va., and was built in the early 1990s. It was named in honor of U.S. District Court judge Albert V. Bryan on June 26, 1995, through Congressional legislation sponsored by U.S. Senator John Warner of Virginia. From the mid-1980s until 1995, the name was applied to the 1932 federal courthouse at 200 South Washington Street that is now called the Martin V.B. Bostetter Courthouse.

King Street–Old Town (also known by its former name, King Street) is an Washington Metro station in Alexandria, Virginia, United States. The station opened on December 17, 1983, and is operated by the Washington Metropolitan Area Transit Authority (WMATA). Providing service for both the Blue and Yellow Lines, this is the southernmost transfer station for the Blue and Yellow lines, as the two lines diverge just south of the station. During inclement weather, Crystal City is commonly used as an unofficial transfer point, being the southernmost underground station common to both lines. King Street was originally served only by the Yellow Line, until the Blue Line was extended from National Airport to Van Dorn Street in 1991. The station is located at King Street and Commonwealth Avenue. Entrances to the station are located on King Street and on the Diagonal Road side of the station. The station is above ground, and access to the single island platform is provided by one pair of escalators, one staircase, and one elevator.

Donors Trust is an American nonprofit donor-advised fund. It was founded in 1999 with the goal of "safeguarding the intent of libertarian and conservative donors". As a donor advised fund, Donors Trust is not legally required to disclose the identity of its donors, and most of its donors remain anonymous. It distributes funds to various conservative and libertarian organizations, and has been characterized as the "dark money ATM" of the political right.: 1 It is affiliated with Donors CapitalFund, another donor-advised fund. In September 2015, Lawson Bader was announced as the new president of both Donors Trust and Donors Capital Fund. Bader was formerly president of the Competitive Enterprise Institute and Vice President at the Mercatus Center.

Donors Capital Fund is a nonprofit United States donor-advised charity that distributes grants to conservative and libertarian organizations. Donors Capital Fund is associated with Donors Trust, another donor-advised fund.

The United States Patent and Trademark Office (USPTO) is an agency in the U.S. Department of Commerce that serves as the national patent office and trademark registration authority for the United States. The USPTO's headquarters are in Alexandria, Virginia, after a 2005 move from the Crystal City area of neighboring Arlington, Virginia. The USPTO is "unique among federal agencies because it operates solely on fees collected by its users, and not on taxpayer dollars". Its "operating structure is like a business in that it receives requests for services—applications for patents and trademark registrations—and charges fees projected to cover the cost of performing the services [it] provide[s]".The Office is headed by the Under Secretary of Commerce for Intellectual Property and Director of the United States Patent and Trademark Office, a position last held by Andrei Iancu until he left office on January 20, 2021. As of March 2021, Commissioner of Patents Drew Hirshfeld is performing the functions of the Under Secretary and Director in the absence of an appointment or nomination to the positions.The USPTO cooperates with the European Patent Office (EPO) and the Japan Patent Office (JPO) as one of the Trilateral Patent Offices. The USPTO is also a Receiving Office, an International Searching Authority and an International Preliminary Examination Authority for international patent applications filed in accordance with the Patent Cooperation Treaty.

The National Inventors Hall of Fame (NIHF) is an American not-for-profit organization, founded in 1973, which recognizes individual engineers and inventors who hold a U.S. patent of significant technology. Besides the Hall of Fame, it also operates a museum in Alexandria, Virginia, sponsors educational programs, and a collegiate competition.As of 2020, 603 inventors have been inducted, mostly constituting historic persons from the past three centuries, but including about 100 living inductees. Nominees must hold a U.S. patent of significant contribution to the U.S. welfare, and which advances science and useful arts. The 2020 class included 22 inventors.

The Congressional Institute is a nonprofit organization based in Alexandria, Virginia. The organization is best known for sponsoring an annual January retreat for Republican members of Congress . The organization also sponsors the Congressional Art Competition and publishes nonpartisan educational resources such as the House Floor Procedures Manual. It was founded in 1987 by Jerry Climer. The Institute's current president is Mark Strand.

ThinkFun, formerly known as Binary Arts, is a toy and board game company founded in 1985 by Bill Ritchie and Andrea Barthello. The two started the company from the basement of their home in Virginia, with a product base that initially consisted of four games invented by a family friend William Keister (Spin-out, The Cat, The Horse and Hexadecimal Puzzle). The husband and wife team used these products as a launching pad for their company, and within six months they were able to move the company headquarters out of their basement and into a more workable space and were able to begin to expand their product line.

Bruin's Slave Jail is a two-story brick building in Alexandria, Virginia, from which slave trader Joseph Bruin imprisoned slaves. Bruin's company, called Bruin and Hill, transported captured Africans to slave markets in the Southern United States. At the start of the American Civil War, Bruin was captured and imprisoned in Washington, D.C. His property, including the slave jail, was confiscated by U.S. Marshals and used as the Fairfax County Courthouse until 1865. All that remains today of the entire compound is a brick, two-story structure that housed the enslaved peoples. Bruin's home, kitchen, and wash-house no longer remain.