University of Łódź
The library of the University of Łódź is one of the biggest and most modern academic libraries in Central Europe. 
Its total collection amounts to 3 million volumes. The main part of the book collection is in library store-rooms. The remaining books and journals are placed in the reference sections: the Main Reading Room and Study Rooms. Registered users can use self checkout machines for lending and returning books in some collections. Apart from the Main University Library there are 106 branch libraries and their collections are adjusted to the scientific and didactic activities of the institutions. The number of registered library card holders is now over 20,000.
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.