Washington, D.C. - Wikipedia
During the War of 1812. Retrocession and Civil War. Growth and redevelopment. Civil rights and the home rule era. Politics and government. Voting rights debate.
Washington, D.C., previously the District of Columbia, is the capital and the only federal district of the United States. It is situated on the east bank the Potomac River. This river forms the country's southwestern and southerly borders with the U.S. states of Virginia and Maryland on its remaining side. The federal district was named after Columbia, the female personification of America, and named in honor of George Washington, the Founding Father of the United States and the first president of the United States. The U.S. Federal Government and several international organisations have their headquarters in the city, making it a major political center worldwide. It was visited by more than 20 million people in 2016, making it one of the most popular cities in America. 
The U.S. Constitution allows for a federal district to be under the sole jurisdiction of Congress. Therefore, the district is not a part or any U.S. state. On July 16, 1790, the Residence Act approved the establishment of a capital district along the Potomac River close to the country's East Coast. In 1791, the City of Washington was established to serve as the nation's capital. Congress held its first session in Washington in 1800. The federal district was officially established in 1801, a territory that had been part of Maryland and Virginia. Congress returned land that Virginia had ceded to it in 1846. It also created a single municipal government in the remainder of the district. Since the 1880s, efforts have been made to make the city a state. A bill for statehood was passed by the House of Representatives on 2021.