WKrasiński Library was a library in Warsaw, founded in 1844. During the German invasion and occupation of Poland, part of the building was destroyed and its collections were stolen, redistributed, or burned. Its surviving collections are now at the National Library of Poland.
WMain Judaic Library is a currently defunct library, which was gathering collections concerning Judaism and the history of Jews in Poland.
WThe Main Library of Cardinal Stefan Wyszyński University in Warsaw is the central research library of the Cardinal Stefan Wyszyński University in Warsaw.
WThe National Library is the central Polish library, subject directly to the Ministry of Culture and National Heritage of the Republic of Poland.
WPolona – Polish digital library, which provides digitized books, magazines, graphics, maps, music, fliers and manuscripts from collections of the National Library of Poland and co-operating institutions. It begun its operation in 2006 .
WThe University of Warsaw Library is a library of the University of Warsaw, Poland.
WWarsaw Public Library – Central Library of Masovian Voivodeship is a public library serving as the main city public library of Warsaw, as well as of the Masovian Voivodeship, and one of the largest in Poland.
WThe Załuski Library was built in Warsaw in 1747–1795 by Józef Andrzej Załuski and his brother, Andrzej Stanisław Załuski, both Roman Catholic bishops. The library was the first Polish public library, the largest library in Poland, and one of the earliest public libraries in Europe.