Title: List of capitals in the United States
Content:  This is a list of capital cities of the United States, including places that serve or have served as federal, state, insular area, territorial, colonial and Native American capitals. Washington has been the federal capital of the United States since 1800. Each U.S. state has its own capital city, as do many of its insular areas. Most states have not changed their capital city since becoming a state, but the capital cities of their respective preceding colonies, territories, kingdoms, and republics typically changed multiple times. There have also been other governments within the current borders of the United States with their own capitals, such as the Republic of Texas, Native American nations and other unrecognized governments.
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: New York City
Content:  New York was the last capital of the U.S. under the Articles of Confederation and the first capital under the Constitution of the United States. New York City as the U.S. capital hosted several events of national scope in 1789&mdash;the first President of the United States, George Washington, was inaugurated; the first United States Congress and the Supreme Court of the United States each assembled for the first time; and the United States Bill of Rights was drafted, all at Federal Hall on Wall Street. By 1790, New York had surpassed Philadelphia to become the largest city in the United States, but by the end of that year, pursuant to the Residence Act, the national capital was moved to Philadelphia.
Title: List of capitals in the United States
Content:  Each state has a capital that serves as the seat of its government. Ten of the thirteen original states and 15 other states have changed their capital city at least once; the last state to move its capital city was Oklahoma in 1910. In the following table, the "Since" column shows the year that the city began serving as the state's capital. The MSA/µSA and CSA columns display the population of the metro area the city is a part of, and should not be construed to mean the population of the city's sphere of influence or that the city is an anchor for the metro area. Fields colored light yellow denote that the population is a micropolitan statistical area.
Title: List of capitals in the United States
Content:  in New Mexico. Twenty-two state capitals have been a capital longer than their state has been a state, since they served as the capital of a predecessor territory, colony, or republic. Boston, Massachusetts, has been a capital city since 1630; it is the oldest continuously-running capital in the United States. Santa Fe, New Mexico, is the oldest capital city, having become capital in 1610 and interrupted only by the aforementioned Pueblo Revolt. An even older Spanish city, St. Augustine, Florida, served as a colonial capital from 1565 until about 1820, more than 250 years. The table below includes the following information:
Title: List of capitals in the United States
Content:   The cities below served either as official capitals of the United States under the United States Constitution, or, prior to its ratification, sites where the Second Continental Congress or Congress of the Confederation met. (The United States did not have a permanent capital under the Articles of Confederation.) The current Constitution was ratified in 1787 and gave the Congress the power to exercise "exclusive legislation" over a district that "may, by Cession of particular States, and the acceptance of Congress, become the Seat of the Government of the United States." The 1st Congress met at Federal Hall in New York. In 1790, it passed the Residence Act, which established the national capital at a 
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: List of capitals in the United States
Content: Washington (now Washington-on-the-Brazos), 1836 ; Harrisburg (now part of Houston), 1836 ; Galveston, 1836 ; Velasco, 1836 ; West Columbia, 1836 ; Houston, 1837–1839 ; Austin, 1839–1845 During its history as a sovereign nation (Republic of Texas, 1836–1845), seven sites served as the capital of Texas: Annexed by the United States in 1845, Austin remains the capital of the state of Texas.
Title: List of capitals in the United States
Content:  along the Potomac River that would become Washington, D.C. For the next ten years, Philadelphia served as the temporary capital. There, Congress met at Congress Hall. On November 17, 1800, the 6th United States Congress formally convened in Washington, D.C. Congress has met outside of Washington only twice since: on July 16, 1987, at Independence Hall in Philadelphia, to commemorate the 200th anniversary of ratification of the Constitution; and at Federal Hall National Memorial in New York on September 6, 2002, to mark the first anniversary of the September 11 attacks. Both meetings were ceremonial. On July 2, 1923, President Warren G. Harding declared Meacham, Oregon, as the nation's capital for the day.
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. 

Question: What is the capital of United States of America?
Answer: Washington, D.C.
Washington.
Washington DC.
Washington, DC.
DC.
D.C.
District of Columbia.
Washington, District of Columbia.
Washington D.C.
The District.