What is the most famous building in Washington, D.C.?

The most famous building in Washington, D.C. is the Capitol Building. As the home of the United States Congress, the Capitol Building serves as the legislative center of the U.S. government. Its iconic dome and neoclassical architecture make it one of the most recognized structures in the country. The building is the site of significant national events, including presidential inaugurations and state addresses. It is open to the public for tours, offering visitors a chance to learn about the legislative process and the history of American democracy.