List of the largest libraries in the United States
The largest public library in the United States—and the largest library in the world—is the Library of Congress in Washington, D.C., which is the "de facto" national library of the United States. It holds more than 167 million items, including "more than 39 million books and other printed materials, 3.6 million recordings, 14.8 million photographs, 5.5 million maps, 8.1 million pieces of sheet music and 72 million manuscripts." Other than the Library of Congress, the largest public library in the United States is the New York Public Library, while the largest research library in the United States is the Harvard Library.
Royal Library, Denmark
The Royal Library () in Copenhagen is the national library of Denmark and the university library of the University of Copenhagen. It is among the largest libraries in the world and the largest in the Nordic countries. In 2017 it merged with the State and University Library in Aarhus to form a combined national library. The combined library organisation (the separate library locations in Copenhagen and Aarhus are maintained) is known as the Royal Danish Library ().