Title: Washington, D.C.
Content:  Washington, D.C., formally the District of Columbia, also known as just Washington or just D.C., is the capital city of the United States. It is located on the east bank of the Potomac River which forms its southwestern and southern border with the U.S. state of Virginia, and shares a land border with the U.S. state of Maryland on its remaining sides. The city was named for George Washington, the first president of the United States and a Founding Father, and the federal district is named after Columbia, a female personification of the nation. As the seat of the U.S. federal government and several international organizations, the city is an important world 
Title: Caput Mundi
Content:  The capital of the United States of America and the seat of the U.S. federal government, Washington, D.C. also holds the headquarters of important international organizations such as the World Bank, the International Monetary Fund, and the Organization of American States. The signing of the North Atlantic Treaty took place in Washington; this treaty established NATO, which took part in the Cold War, and by its end, Washington was dubbed by The Washington Post as the capital of the world.
Title: Arts and culture of Washington, D.C.
Content:  Washington, D.C. is the capital of the United States, and is home to over 600,000 people from nations all over the world. Its diversity has fostered a culture that is unique to the country. Washington, D.C. has a wide range of restaurants, theaters, historic sites, and events. 
Title: Outline of Washington, D.C.
Content: The District of Columbia is: The federal capital district of the United States of America ; Location ; Northern hemisphere ; Western hemisphere ; Americas ; North America ; Anglo America ; Northern America ; United States of America ; Contiguous United States ; Eastern United States ; East Coast of the United States &ndash; even though the District of Columbia does not include any coastline, it is generally considered to be part of the Eastern Seaboard region. ; Northeast megalopolis ; Mid-Atlantic states ; Population of Washington, D.C.: 601,723 (2010 U.S. Census ) ; Area of Washington, D.C.: 63.8 mi sq 
Title: History of Washington, D.C.
Content:  The history of Washington, D.C., is tied to its role as the capital of the United States. Originally inhabited by an Algonquian-speaking people known as the Nacotchtank, the site of the District of Columbia along the Potomac River was first selected by President George Washington. The city came under attack during the War of 1812 in an episode known as the Burning of Washington. Upon the government's return to the capital, it had to manage the reconstruction of numerous public buildings, including the White House and the United States Capitol. The McMillan Plan of 1901 helped restore and beautify the downtown core area, including establishing the National Mall, along with numerous monuments and museums. Unique among cities with a high percentage of African Americans, 
Title: Washington metropolitan area
Content:  The Washington metropolitan area (also known as the National Capital Region and colloquially as the DMV for "D.C., Maryland, Virginia") is the metropolitan area centered on Washington, D.C., the capital of the United States. The area includes all of the federal district and parts of the U.S. states of Maryland, Virginia and West Virginia. It is part of the larger Baltimore–Washington metropolitan area. The Washington D.C. metropolitan area is one of the most educated and most affluent metropolitan areas in the US. The metro area anchors the southern end of the densely populated Northeast megalopolis with an estimated total population of 6,385,162, making it the sixth-largest metropolitan area in the nation and the largest metropolitan area in the Census Bureau's South Atlantic division.
Title: Washington, D.C.
Content:  capital. It is one of the most visited cities in the U.S., seeing over 20 million visitors in 2016. The U.S. Constitution provides for a federal district under the exclusive jurisdiction of Congress; the district is therefore not a part of any U.S. state (nor is it one itself). The signing of the Residence Act on July 16, 1790, approved the creation of a capital district located along the Potomac River near the country's East Coast. The City of Washington was founded in 1791 to serve as the national capital, and Congress held its first session there in 1800. In 1801, the territory, formerly part of Maryland and Virginia (including the settlements 
Title: East Coast of the United States
Content:  in 2018, is the largest central business district in the world. Washington, D.C. is the capital and political nerve center of the United States. Many organizations such as defense contractors, civilian contractors, nonprofit organizations, lobbying firms, trade unions, industry trade groups and professional associations have their headquarters in or near Washington, D.C., in order to be close to the federal government. Miami and Florida are two of the top domestic and international travel destinations in the United States. Miami is the warmest major city in the United States in winter, this factor contributes to it being a major tourism hub for international visitors. 
Title: Culture of Washington, D.C.
Content:  The culture of Washington, D.C. is reflected in its status as the capital of the United States and the presence of its federal government, its predominantly Black population, and role as the largest city in the Chesapeake Bay region. The presence of the U.S. federal government has been instrumental in developing numerous cultural institutions throughout the city. During the early 20th century, Washington's U Street Corridor became an important center for African American culture.
Title: Outline of Washington, D.C.
Content:  The following outline is provided as an overview of and topical guide to District of Columbia: Washington, D.C., legally named the District of Columbia, in the United States of America, was founded on July 16, 1790, after the inauguration of City of Washington, the new capital of the country. The area given to District of Columbia, was originally 100 sqmi ceded by the states of Maryland and Virginia in accordance with the Residence Act; however, in 1846, the retrocession of the District of Columbia, meant that the area of 31 sqmi which was ceded by Virginia was returned, leaving 69 sqmi of territory originally ceded by Maryland as the current area of the District in its entirety. The City of Washington was originally a separate municipality within the Territory of Columbia until the District of Columbia Organic Act of 1871 effectively merged the City and the Territory into a single entity. It is for this reason that everything within its boundaries is legally the District of Columbia.

Question: What is Washington, D.C. the capital of?
Answer: United States of America.
the United States of America.
America.
U.S.A.
USA.
U.S.
US.
the US.
the USA.
US of A.
the United States.
U. S. A.
U. S.
the States.
the U.S.
'Merica.
U.S.
United States.
'Murica.