Oscar Straus Memorial

The Ronald Reagan Building and International Trade Center, named after former United States President Ronald Reagan, is located in downtown Washington, D.C., and was the first federal building in Washington designed for both governmental and private sector purposes. Each of the organizations located in the Pennsylvania Avenue building is dedicated to international trade and globalization. Organizations headquartered in this building include U.S. Customs and Border Protection, U.S. Agency for International Development, and the Woodrow Wilson International Center for Scholars. The first private sector lease was signed with investment banking firm Quarterdeck Investment Partners, Inc. The building hosts conferences, trade shows, cultural events, and outdoor concerts. Post-9/11, security requirements for high-profile federal buildings have limited the amount of public/private access anticipated by the center's designers.

The National Children’s Museum is a children's museum and science center in downtown Washington, D.C. It is intended to serve children up to age 12 and their families through interactive exhibits exploring science, technology, engineering, art, and math. Founded in 1974, the Museum operated from 1979 to 2004 at 220 H Street, NE. It then operated as a “museum without walls,” until 2009, when it opened a new location in National Harbor, Maryland. That closed in 2015. A new location opened on February 24, 2020, in the Ronald Reagan Building in downtown Washington, before temporarily closing due to the COVID-19 pandemic. The Museum reopened on September 2, 2021. The Museum’s mission is to inspire children to care about and change the world. The Museum received a U.S. Congressional designation in 2003 when Congress identified a need for a nationally recognized cultural and educational institution specifically for children.

The Woodrow Wilson International Center for Scholars (or Wilson Center) is quasi-government entity and think tank which conducts research to inform public policy. Located in the Ronald Reagan Building and International Trade Center in Washington, D.C., it is a United States Presidential Memorial that was established as part of the Smithsonian Institution by an act of Congress in 1968. So-named for Woodrow Wilson's achievement of being the only President of the United States to hold a PhD, the center is also a think tank, ranked multiple times by the University of Pennsylvania's Think Tanks and Civil Societies Program as among the ten best in the world.On January 28, 2021, Mark Andrew Green was announced as the Wilson Center's next president, director and CEO. He began his term on March 15, 2021.

The National Aquarium, Washington, D.C., was an aquarium in Washington D.C. It was located in the Herbert C. Hoover Building (owned by the General Services Administration), which is bounded by 14th Street NW on the east, 15th Street NW on the west, Pennsylvania Avenue NW on the north, and Constitution Avenue NW on the south.Although the National Aquarium in Washington, D.C. was smaller than its Baltimore counterpart, with the experience taking around 45 minutes, it was the nation's first free and public aquarium. It closed on September 30, 2013, after 140 years.

The John A. Wilson District Building, popularly known simply as the Wilson Building, houses the municipal offices and chambers of the Mayor and the Council of the District of Columbia. Originally called the District Building, it was renamed in 1994 to commemorate former Council Chair John A. Wilson. Completed in 1908, during the administration of 26th President Theodore Roosevelt, the building is a contributing structure to the Pennsylvania Avenue National Historic Site.

The 1977 Hanafi Siege occurred on March 9–11, 1977 when three buildings in Washington, D.C. were seized by 12 Hanafi Movement gunmen. The gunmen were led by Hamaas Abdul Khaalis, who wanted to bring attention to the murder of his family in 1973. They took 149 hostages. After a 39-hour standoff, the gunmen surrendered and all remaining hostages were released from the District Building (the city hall; now called the John A. Wilson Building), B'nai B'rith headquarters, and the Islamic Center of Washington. The gunmen killed 24-year-old Maurice Williams, a radio reporter from WHUR-FM, who stepped off a fifth-floor elevator into the crisis (the fifth floor is where the mayor and Council Chairmen have their offices). The gunmen also shot D.C. Protective Service Division police officer Mack Cantrell, who died in the hospital a few days later of a heart attack. Then-Councilman and future 4-term Washington, D.C. Mayor Marion Barry walked into the hallway after hearing a commotion and was hit by a ricocheted shotgun pellet, which lodged just above his heart. He was taken out through a window and rushed to a hospital. The gunmen had several demands. They wanted the government to hand over a group of men who had been convicted of killing seven relatives – mostly children – of takeover leader Hamaas Khaalis. They wanted those that were convicted of killing Malcolm X. They also demanded that the premiere of Mohammad, Messenger of God be canceled and the film destroyed because they considered it sacrilegious.Time magazine noted: That the toll was not higher was in part a tribute to the primary tactic U.S. law enforcement officials are now using to thwart terrorists—patience. But most of all, perhaps, it was due to the courageous intervention of three Muslim ambassadors, Egypt's Ashraf Ghorbal, Pakistan's Sahabzada Yaqub-Khan and Iran's Ardeshir Zahedi.

The Herbert C. Hoover Building is the Washington, D.C. headquarters of the United States Department of Commerce. The building is located at 1401 Constitution Avenue, Northwest, Washington, D.C., on the block bounded by Constitution Avenue NW to the south, Pennsylvania Avenue NW to the north, 15th Street NW to the west, and 14th Street NW to the east. It is located in the Federal Triangle, east of President's Park South (the Ellipse), north of the National Mall, and west of other Department of Commerce buildings, the John A. Wilson Building (District Building with the government of the District of Columbia / Washington, D.C.), and the Ronald Reagan Building. The building is owned by the General Services Administration. Completed in 1932, it was renamed after Herbert Hoover in 1981. Hoover served as Secretary of Commerce (1921–1928) and later President (1929–1933). The closest Washington Metro station is Federal Triangle. The White House Visitor Center (on the first floor) is in the Hoover Building.

Bearing Witness is an outdoor 1997 sculpture by Martin Puryear, installed outside the Ronald Reagan Building and International Trade Center in Washington, D.C., in the United States.

The Department of Labor Building, also known as the William Jefferson Clinton Federal Building, is a historic office building, located at 14th Street, and Constitution Avenue, Northwest, Washington, D.C., in the Federal Triangle. It was the headquarters building for the United States Department of Labor from its opening until the 1970s. It later housed the U.S. Customs Service, and is currently occupied by the U.S. Environmental Protection Agency (EPA).

The Federal Triangle is a triangular area in Washington, D.C. formed by 15th Street NW, Constitution Avenue NW, Pennsylvania Avenue NW, and E Street NW. Federal Triangle is occupied by 10 large city and federal office buildings, all of which are part of the Pennsylvania Avenue National Historic Site. Seven of the buildings in Federal Triangle were built by the U.S. federal government in the early and mid-1930s as part of a coordinated construction plan that has been called "one of the greatest building projects ever undertaken" and all seven buildings are now designated as architecturally historic. The Federal Triangle Washington Metro station serves Federal Triangle and the surrounding area.

Murder Bay was a disreputable slum in Washington D.C. roughly bounded by Constitution Avenue NW, Pennsylvania Avenue NW, and 15th Street NW. The area was a center of crime through the early 20th century, with an extensive criminal underclass and prostitution occurring in several brothels and hotels in the area. The area was completely rebuilt during the construction of the Federal Triangle project in the late 1920s and 1930s.

Federal Triangle Flowers is an outdoor 1998 sculptural work by Stephen Robin, installed in Woodrow Wilson Plaza, between the Ariel Rios Building and the Ronald Reagan Building and International Trade Center, in Washington, D.C., United States. The installation includes two pieces, one depicting a single stem rose and the other a lily. The cast-aluminum sculptures are set on limestone pedestals; both flowers measure approximately 10 feet (3.0 m) x 14 feet (4.3 m) x 7 feet (2.1 m).