Washington, D.C. — Capital of United States

Washington, D.C. was established as the nation's capital by the Residence Act of 1790, a deliberate political compromise brokered largely by Thomas Jefferson, James Madison, and Alexander Hamilton: southern states agreed to have the new federal government assume the states' Revolutionary War debts, in exchange for locating the permanent capital on the Potomac River, in territory carved out of Maryland and Virginia rather than in any existing major city like New York or Philadelphia, both of which had served as temporary capitals earlier in the 1780s and 1790s.

The city was named for George Washington, who personally selected the exact site along the Potomac, and it was laid out by French-born engineer Pierre Charles L'Enfant, whose ambitious plan of broad diagonal avenues overlaid on a grid, radiating from the Capitol and President's House, was intended to rival the grand European capitals of the era; L'Enfant was dismissed from the project in 1792 after clashing repeatedly with the commissioners overseeing the city's construction, and much of his plan was completed by others, notably surveyor Andrew Ellicott, using L'Enfant's underlying design.

The federal district originally included land ceded by both Maryland and Virginia, forming a diamond shape roughly 10 miles on each side, but the Virginia portion — including the city of Alexandria — was retroceded back to Virginia in 1846 after residents there petitioned Congress, largely over concerns that federal control was stifling the area's economic development and, some historians argue, over anxiety that the capital might move to abolish slavery within the district; the modern District of Columbia retains only the Maryland-ceded portion as a result.

The city has been the target of direct attack only once in its history: British forces burned much of Washington, including the Capitol and the President's House, during the War of 1812 in August 1814, in retaliation for earlier American raids into Canada; the President's House was subsequently rebuilt and painted white to cover the fire damage, which is the origin most historians accept for the building's popular name, the White House, though the name had been used informally even before the fire.

Because Washington, D.C. is a federal district rather than a state, its residents did not gain the right to vote in presidential elections until the 23rd Amendment was ratified in 1961, and to this day the district has no full voting representation in Congress, a genuine and ongoing point of American political debate reflected in local license plates that read "End Taxation Without Representation" — a grievance the city's residents frame as a direct echo of the same complaint that helped trigger the American Revolution in the first place.

The 1846 Virginia retrocession is sometimes discussed today alongside modern D.C. statehood proposals, since it means the current district's boundaries are themselves the product of a mid-19th-century political adjustment rather than a fixed, unchangeable Founding-era design — a historical precedent statehood advocates occasionally cite to argue that Congress has altered the district's status before and could plausibly do so again.

Pierre L'Enfant's original plan, though he was dismissed before seeing it built, is still the basic framework the modern city follows: the diagonal avenues he laid out, later named for the states, deliberately created sightlines and traffic circles intended to allow, according to some accounts, artillery to sweep the streets in the event of civil unrest — a defensive design consideration reflecting the genuine anxieties of a young capital built from scratch rather than grown organically like most national capitals of the era.