Library of Congress (American)

The Library of Congress is the United States' largest and most comprehensive library, serving as the nation’s official research and cultural institution. It collects, preserves, and provides access to a vast array of materials—including books, recordings, maps, photographs, and digital resources—covering all subjects and periods. Located in Washington, D.C., it supports Congress, researchers, and the public with historical, legal, and scholarly information. Its mission is to preserve the nation’s intellectual heritage and ensure that knowledge is accessible for future generations.