The Law Library of Congress is the national law library of the United States and is located in Washington, D.C. It is a research library that is open to the public and serves as a resource for legal research and information for Congress, the federal courts, and the executive branch of the U.S. government. The Law Library of Congress was established in 1832 and is the largest law library in the world, with over 2.7 million volumes in its collection.