Jagiellonian Library
Jagiellonian Library (, popular nickname "Jagiellonka") is the library of the Jagiellonian University in Kraków and with almost 6.7 million volumes, one of the biggest libraries in Poland, serving as a public library, university library and part of the Polish national library system. It has a large collection of medieval manuscripts, for example Copernicus' "De Revolutionibus" and Jan Długosz's "Banderia Prutenorum", and a large collection of underground literature (so-called "drugi obieg" or samizdat) from the period of communist rule in Poland (1945–1989). The Jagiellonian also houses the "Berlinka" art collection, whose legal status is in dispute with Germany.
Chicago Public Library
The American Library Association reports that the library holds 5,721,334 volumes, making it the 9th largest public library in the United States by volumes held, and the 30th largest academic or public library in the United States by volumes held. The Chicago Public Library is the second largest library system in Chicago by volumes held (the largest is the University of Chicago Library). The library is the second largest public library system in the Midwest, after the Detroit Public Library.