What is the most famous U.S. government building?

The most famous U.S. government building is the White House in Washington, D.C. Serving as the official residence and workplace of the President of the United States, the White House has been the home of every U.S. president since John Adams in 1800. Its neoclassical design, iconic white exterior, and central role in U.S. politics make it one of the most recognized buildings in the world. The White House also serves as the site of important ceremonies, press conferences, and meetings with world leaders.