The United States Capitol, often called the Capitol or the Capitol Building, is the seat of the United States Congress, the legislative branch of the federal government. It is located on Capitol Hill at the eastern end of the National Mall in Washington, D.C.

Capitol Hill is a neighborhood in Washington, D.C., located in both Northeast and Southeast D.C. Some of the government’s most powerful edifices – the U.S. Capitol, the Supreme Court and the U.S. House and Senate – make their homes on this famed incline, where Instagram-ready views of the Capitol Dome come at almost every turn.

The Library of Congress is a research library in Washington, D.C., serving as the library and research service for the United States Congress and the de facto national library of the United States. It is the largest library in the world, with millions of books, recordings, photos, maps and manuscripts in our collections.