The capital of the United States is Washington, D.C. Established as the capital in 1800, Washington, D.C. serves as the seat of the federal government. It is not part of any state and is a separate federal district. The city is home to important government institutions, including the White House, the U.S. Capitol, and the Supreme Court. It also features several national monuments and museums, many of which are located on the National Mall, which attracts millions of visitors each year. Its design was influenced by various architects and artists, making it a significant cultural and historical hub.