Washington, DC is the capital of the United States. The states of Maryland and Virginia each donated land to form the federal district, which included the preexisting settlements of Georgetown and Alexandria; however, Congress returned the Virginia portion in 1846. Named in honor of George Washington, the City of Washington was founded in 1791 to serve as the new national capital. Congress created a single municipal government for the whole District of Columbia after the American Civil War.
The centers of all three branches of the federal government of the United States are in the District, including the Congress, President, and Supreme Court. Washington is home to many national monuments and museums, which are primarily situated on or around the National Mall. The city hosts 176 foreign embassies as well as the headquarters of many international organizations, trade unions, non-profit organizations, lobbying groups, and professional associations.
Washington, D.C., has an estimated population of 632,000.