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.
Jagiellonian University
The university's main library, the Jagiellonian Library ("Biblioteka Jagiellońska"), is one of Poland's largest, with almost 6.5 million volumes; it is a constituent of the Polish National Libraries system. It is home to a world-renowned collection of medieval manuscripts, which includes Copernicus' "De Revolutionibus" and the "Balthasar Behem Codex". The library also has an extensive collection of underground political literature (so-called "drugi obieg" or "samizdat") from Poland's period of Communist rule between 1945 and 1989.